Feature: Content app sidebar redesign

[finnar-bin]

• Updated content app sidebar
• Closes Reordering content navigation tree not working properly #1385
• Closes Content: App Sidebar Revamp #2115

Note:

This PR is dependent on zesty-io/material#78 for proper styling

Preview

content-app-sidebar.webm

[zcolah]

1. Visually no issues
2. The filter models input is behaving a little laggy and slow
3. I unfortunately cannot expand and collapse most menu list items (not sure why)
4. Loom on the above: https://www.loom.com/share/3ec8d95cd84842d285a102e871bc9793?from_recorder=1&focus_title=1

[agalin920]

.

[finnar-bin]

@agalin920 I'll try to look for a way to optimize how the tree data is built. As for the NavTree being rendered 3 times, I don't think there's really any way around it since I had to put in 3 different NavTree components, each for Pages, Headless and Hidden items.

I do agree that flattening out the filter list would make it faster since we'll only have to render 1 NavTree in that case but I think I still have to make some loops to add in the icons and the hover action elements for each nav item that matches the filter keyword.

[agalin920]

@theofficialnar Ah got ya didn't realize it was three different ones. Disregard comment