Once a drag starts, we won't fire click listeners or style any elements
as active.

- Don't fire click listeners or show active state once a drag is in
progress
- Don't show hover style when a drag is in progress
- Draw borders above content
- If borders are opaque, apply them to the content mask. This prevents
hovers from firing on content underneath the border, which was creating
issues where the drag handle was inside the border, so we'd flicker the
hover when the mouse moved out of the drag handle and into the 1px
border on the left dock.
- Add a `block_mouse` helper which causes transparent elements to paint
an "opaque" layer to prevent mouse events from falling through. We use
this for the drag handle as well to disable hover, click, etc on items
in the panel.

Release Notes:

- N/A

* Ensure that views' on_release callbacks are always called (even if
their window is gone), by passing them a `AppContext`, not a
`WindowContext`.
* Fix leaked handles to `CollabPanel`, `NotificationPanel`, and
`ChatPanel` caused by captures in a `ListState` render callback.

This fixes two issues we were seeing with following:
* inability to rejoin a remote project after you closed it
* following not working if a window had previously been closed

Deals with https://github.com/zed-industries/community/issues/2347
Part of https://github.com/zed-industries/community/issues/1538

Now file finder will match all gitignored worktree entries.
Zed does not traverse gitignored dirs by default, which means that not
all gitignored files will be matches, but all that were toggled in
project panel and all root non-directory gitignored entries will be now
used, hopefully causing less questions.

Release Notes:

- Improved file finder to match all gitignored files that were added
into worktrees (e.g. due to opening gitignored directories in project
panel)

Also, remove unnecessary window handle from Workspace.

This PR adds a new `ToggleButton` component:

<img width="738" alt="Screenshot 2023-12-20 at 6 50 13 PM"
src="https://github.com/zed-industries/zed/assets/1486634/9c5fb45b-0b55-4008-9336-b651a26a99ad">

We're using `ToggleButton`s for the search mode selection in the buffer
search:

<img width="842" alt="Screenshot 2023-12-20 at 6 47 57 PM"
src="https://github.com/zed-industries/zed/assets/1486634/178a278f-172c-4c67-8572-83d59de2ed14">

Release Notes:

- N/A

Currently, I get 404 when trying to open links for nightly, like
https://zed.dev/nightly/channel/Rooms-329
The PR ensures nightly has a separate protocol handler in zed2, removes
nightly mentions from zed1.

See also zed.dev change:
https://github.com/zed-industries/zed.dev/pull/429

Release Notes:

- N/A

Release Notes:

- N/A

This PR refines the toolbar styling, specifically around the buffer
search.

Spacing has been adjusted to feel less claustrophobic.

Release Notes:

- N/A

This PR styles the incoming call notification.

<img width="405" alt="Screenshot 2023-12-20 at 3 56 39 PM"
src="https://github.com/zed-industries/zed/assets/1486634/9cfb89e7-ba5f-4463-bf53-a3f8a82e136f">

Release Notes:

- N/A

So we're not beholden to the current focus.

It was pulling in gpui1 into zed2 build.

Release Notes:

- N/A

This PR makes a first pass at styling the notification panel.

#### Signed out

<img width="381" alt="Screenshot 2023-12-20 at 11 41 25 AM"
src="https://github.com/zed-industries/zed/assets/1486634/f045fa17-4ebc-437f-a25b-d7695d47f18b">

#### No notifications

<img width="380" alt="Screenshot 2023-12-20 at 11 44 23 AM"
src="https://github.com/zed-industries/zed/assets/1486634/3a7543f2-8cd8-4788-8059-d5663f5f6b4c">

#### Notifications

<img width="386" alt="Screenshot 2023-12-20 at 1 27 08 PM"
src="https://github.com/zed-industries/zed/assets/1486634/13b81722-c47a-4c06-b37d-e6515cbfdb9d">

Release Notes:

- N/A

This allows the content mask to correctly apply to bounds used in event handlers,
which prevents content under opaque borders from being hovered in overflow hidden
containers.

Co-Authored-By: Antonio <antonio@zed.dev>
Co-Authored-By: Max Brunsfeld <max@zed.dev>

This seems to influence sizing calculations in ways I don't fully understand.

Co-Authored-By: Antonio <antonio@zed.dev>
Co-Authored-By: Max Brunsfeld <max@zed.dev>

It looks like we neglected to incorporate surfaces into the
plane-splitting code path, which assigns each graphics primitive's draw
order.

This fixes an issue where screensharing frames were not visible when the
screenshare tab was zoomed.

Co-Authored-By: Antonio <antonio@zed.dev>

Release Notes:

- N/A

Co-Authored-By: Marshall Bowers <marshall@zed.dev>

This could cause multiple mutable references to be acquired for the same
arena element, which is unsafe. I didn't see it cause problems in
practice, but I realized this could have been a problem and fixed it
before it bit us.

Release Notes:

- N/A

Add back a way to show syntax trees and LSP logs in Zed.

Release Notes:

- N/A