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Only using certain parts of Autocomplete from Material UI

I'm trying to use Material-UI's component <Autocomplete/>
However, I want to remove certain functionality that isn't necessarily customizable according to the API. For example I want to remove the multiselect filter tags and shown below. Would it be possible just to take the logic of passing in a list and being able to search/autocomplete?

Create custom button(s) for CKeditor 5 toolbar

I've managed to customize the header and highlight dropdowns for CKEditor 5 – classic editor build by creating a new custom build.
But I don't know how to add additional buttons to the toolbar. For example a fullscreen button.
Current progress: github link

If you want to add existing buttons to the main toolbar, then you need to configure the config.toolbar. In your example it corresponds to these lines.
There's no fullscreen button at this moment. You can add +1 to the https://github.com/ckeditor/ckeditor5/issues/1235 to increase its priority or try to implement this feature on your own.
Basically, to create your own button you need to create a plugin which registers the button in the component factory and adds some actions that will be performed on the buttonView:execute event. You can follow the steps described in creating a simple plugin guide.
A good and complementary reading about the UI library can be found here.

Add custom list box Kendo HTML Editor

We are planning to use Kendo HTML Editor (angular ver.) in one of our app.
This will be used to create E-mail campaigns online. This e-mail template will be personalised so need to include special strings (acting as keys) such as {$firstname}
Is it possible to add listbox in Kendo HTML Editor where we can list these keys?
This will help content editor to pickup any key from list without remembering. And on selection we can add value on cursor position.
Thank you.
Best Regards

So if you want to implement this feature in the toolbar of your editor I would try something like this.
Step 1: Build a toolbar template.
(I can't post more than two links but if you google "angular kendo toolbar template" and find the first demo you'll find my example)
instead of using the anchor they use add an input inside your template.
Step 2: Turn the input into a kendo dropdownlist when the page is ready.
http://demos.telerik.com/kendo-ui/dropdownlist/remotedatasource
Step 3: Add a change event to the datasource then add something like this to the dropdown you just made.
http://demos.telerik.com/kendo-ui/editor/api
you may need to tweak this a little because these examples are mostly kendo in plain js but it's a good place to start.

Override default navigation buttons functionality in jqGrid

Question is simple: Is there a way to override the behaviour of the default buttons placed in the navigation bar of a jqGrid grid?
I'm using the struts2 plugin and I needed to launch an action if user clicks the add button or the edit button to redirect to another page in which this things are done. I wondered if it was possible to override it's default behaviour as I think it's cleaner than defining myself new "add" and "edit" buttons.
Documentation for adding such new buttons HERE.

You create first navigator bar using navigator="true", but with navigatorAdd="false", navigatorEdit="false", navigatorDelete="false" and so on (see the documentation). In the way you will have navigator bar without any buttons. Then you add custom buttons with the same icons like standard editing buttons (see the example which you referenced). You need uses icon: 'ui-icon-pencil' for Edit, ui-icon-plus for Add, and ui-icon-trash for delete. Inside of onclick callback you can place any your custom JavaScript code.
UPDATED: The names and the values of navigatorExtraButtons are build based on the options of navButtonAdd method. I've found additionally this code which should help you.

Javascript combobox with typeahead and hierarchical items

I want to create a combobox with a hierarchical list of items. I need to be able to select the parent items as well as the children individually. I also need to be able to provide typeahead capabilities for this combobox.
For example, I want to make a combobox with this data in JS:
Canada
--Ontario
--Quebec
USA
--Massachusetts
--Ohio
--Texas
From this dropdown I want to be able to select any of the provinces/states individually. I also want to be able to select "Canada" without selecting it's children.
I've tried Select2 and have been digging around JQuery UI to see if it is possible, but so far I can't quite achieve the behaviour I need. I'm writing this page using bootstrap, but the given typeahead in boostrap doesn't seem to work with comboboxes at all (that I can see).

You can use Chosen javascript plugin to achieve this.
http://harvesthq.github.com/chosen/

You can store custom JS objects for each typeahead result so that it can displays and store more than just a string (a type, or ID for example). Using that would let you have different logic for country vs province/state. Here's an example of doing so:
https://github.com/twbs/bootstrap/pull/3682
So in the updater function, you could have logic based on your custom object to determine whether it's a parent or child that was clicked.
As far as making the parent look different than the child, I haven't used it myself, but there is a templating system in bootstrap. Check out this link for an example:
https://github.com/twbs/bootstrap/issues/2441
You could likely use this to differentiate the parent and child look and feel.