Sticky scrolling resets on comment lines

[dgibson66]

When sticky scrolling encounters a line where the comment starts at column 1, it resets. Unfortunately, this is exactly how Toggle Comment creates comments. Please make sticky scrolling ignore comment lines.

[HannesWell]

Sticky scrolling is a UI feature, therefore moved this to the eclipse.platform.ui repository.

@Christopher-Hermann can you please have a look at this?
But since Stick-Scrolling is not language sensitive and only considers indentation I fear that's how it is working.

[Christopher-Hermann]

Yes, the issue is already know.
Good news: I'm already working on an extension point so that every language can provide specific Sticky-Scrolling calculation.
Bad news: I assume it will take some time until it is adapted for java

Also see #1950 and #2128