Add preference page for "Collapse" stack frames feature

[iloveeclipse]

#583 / 3bb53aa provided a (well hidden) feature to group/stack frames.
I'm using that since introduction and it is really useful.

We should add new preference page in Java/Debug/Stack frames that would allow user to not only toggle this feature but also select which frame filters should be used / add new ones / elete existing.

#797 switched org.eclipse.jdt.internal.debug.ui.IJDIPreferencesConstants.PREF_COLLAPSE_STACK_FRAMES on by default.

@gzsombor , @SougandhS: do you have time / interest to provide such a new preference page?

[gzsombor]

Glad to hear that I'm not the only one, who is using and enjoying it 😄
I already made a preference page in #81 - I even added different colors for the different stack frames, just I didn't have the time and enthusiasm to push it through the goal line.