RichTextLabel meta_hover_start and meta_hover_end don’t work along the margins.

[ghost]

Godot version:

ef05306

OS/device including version:

Win10 64bit

Issue description:

@willnationsdev Found this feature #12984, and it is exactly what I need, but I am having issues with it not signaling when the hover exits from the edges when the text is right along a margin.

Steps to reproduce:

1. Create a RichTextLabel with a URL BBCode tag around text that is along an edge or corner.
2. Connect meta_hover_start and meta_hover_end signals.
3. Move control away from the corner of the window.
4. Run the project and move cursor in and out of the URL tagged text along an edge.

Minimal reproduction project:

3.1 RichTextLabel Meta Hover Issue.zip

[girng]

workaround is connecting a mouse_exited signal. but yeah. it's technically a bug within rtl
nice catch!

[ghost]

@girng Yeah, luckily that can be done. Also need to connect a mouse_enter, and use a flag to track the last meta signals. The state is frozen where it last was when going in or out.

My use case is for creating a tooltip inside of RTLs.