- Rects snap to stage edge when within a threshold (10 screen pixels)
- When mouse leaves stage, set last mousedown pos to null, preventing nonfunctional rect outlines
Partially addresses #6306.
There's a technical challenge to fully address the issue - mouse event are not fired when the mouse is outside the stage. While we could draw the rect even if the mouse leaves, we cannot update the rect's dimensions on mouse move, or complete the drawing on mouse up.
To fully address the issue, we'd need to a way to forward window events back to the stage, or at least handle window events. We can explore this later.
Firefox v125.0.3 and below has a bug where `mouseenter` events are fired continually during mouse moves. The issue isn't present on FF v126.0b6 Developer Edition. It's not clear if the issue is present on FF nightly, and we're not sure if it will actually be fixed in the stable v126 release.
The control layers drawing logic relied on on `mouseenter` events to create new lines, and `mousemove` to extend existing lines. On the affected version of FF, all line extensions are turned into new lines, resulting in very poor performance, noncontiguous lines, and way-too-big internal state.
To resolve this, the drawing handling was updated to not use `mouseenter` at all. As a bonus, resolving this issue has resulted in simpler logic for drawing on the canvas.
- Add set of metadata handlers for the control layers CAs
- Use these conditionally depending on the active tab - when recalling on txt2img, the CAs go to control layers, else they go to the old CA area.
- Revise control adapter config types
- Recreate all control adapter mutations in control layers slice
- Bit of renaming along the way - typing 'RegionalGuidanceLayer' over and over again was getting tedious
