Some code attempted to use `BIFIconID` instead of `int` to pass around
icon-ids. Problem is, that this is just a subset of the allowed ids,
more icons may be created at runtime and extend the range of valid
icon-ids. Such icons could give runtime warning prints.
Idea is to use a `using BIFIconID = int;` instead. This way there is
still a descriptive type name, while the whole dynamic range of possible
icon-ids is supported.
Additionally multiple `using BIFIconID = int;` declarations are valid,
so we can place these in multiple headers and use the type name in APIs
instead of just `int`, whithout having to include a single header
defining them. A type mismatch (one instance differs from the others)
will result in a compiler error.
Pull Request: https://projects.blender.org/blender/blender/pulls/111052
This patch includes set of smaller changes to address visual
inconsistencies and bugs:
- Strip previews are drawn under title bar
- All strip previews now disappear when there isn't enough space for
drawing
- Like the sound strip, the color strip expands to fill the whole strip
when there is little vertical space, "taking over" the strip title
Color is more important visual indicator than the name of the strip
- Disabling strip title no longer disables strip handle frame previews
- All strip previews are now be affected by the "Show overlays" toggle
- Turning off strip text overlay no longer makes the color strip
preview disappear
