[Sticky Scrolling] Umbrella issue

[Christopher-Hermann]

This Issue documents all know issues in the sticky scrolling feature with priorties.

High

• [x] Sticky scrolling should allow to be fed by language-specific info/annotations
• [x] [Sticky scrolling] Commented-out code is being incorrectly recognized
• [x] Sticky scrolling resets on comment lines

Low

• [ ] StickyScrollControll Doesn't Show Whitespace Chars
• [x] Vertical Scrolling not handled correctly in StickyScrollControl
• [x] "Show line numbers" settings is not correctly handled

To be checked

• [x] There are several issues in https://github.com/eclipse-platform/eclipse.platform.ui/issues/1954, need to check what issues are still open.
• [x] There are several issues in https://github.com/eclipse-platform/eclipse.platform.ui/pull/1894, need to check what issues are still open.

[twwwt]

Doesn't work so well when one uses a code format where opening braces of a block begin on a new line: For such formats the previous line should also be sticky to provide sufficient context.

What is more, the horizontal indentation doesn't seem to align perfectly when using tabs for indentation.

[BeckerWdf]

Doesn't work so well when one uses a code format where opening braces of a block begin on a new line: For such formats the previous line should also be sticky to provide sufficient context.

What is more, the horizontal indentation doesn't seem to align perfectly when using tabs for indentation.

I think this is the same issue as reported in https://github.com/eclipse-platform/eclipse.platform.ui/issues/1950.