## Link to GitHub Issue or related Pull Request, if one exists
n/a
## Description of change
Adds an overlay window widget for controlling OBS over WebSocket.
Add new lines to the FPS widget that shows recording / streaming timers.
Show notifications for major state changes (stream started/stopped,
recording started/paused/resumed/stopped)
## Testing
## Link to GitHub Issue or related Pull Request, if one exists
n/a
## Description of change
Create three distinct layers for the overlay:
1. Bottommost persistent layer - non-interactable layer that is always
on. This was only for notifications, but now the FPS widget lives here
as well.
2. Overlay windows layer - most interactable windows go here.
3. Topmost main menu - this is reserved for the main menu (escape key)
and this is a modal dialog that occludes the layers below.
Why?
- `toggle overlay` behavior with FPS widget *also* toggling on/off was a
bit confusing (now they're two separate keys)
- FPS widget is popular, but it caused the entire overlay to be active,
which affects how input is handled
- the main menu being a standalone window was a little awkward (now it's
a modal)
## Testing
bicarus