Revert "Do not resize a view to contents, when we only have one column."

This reverts commit ffe1593192860f80a23c3cd19e53dc59f27623e6.

Otherwise we truncate long output lines without giving the user a
way to scroll and read the full contents.

Apparently, performance is not too bad after all with the follow-up
commit that I introduced.

BUG: 336606
Prevents outputwidget to always scroll to bottom.

Mea culpa, I did not fill the m_scrollDelay value map at all, as
I forgot a single "&" in the code :)

Now it should work though.

BUG: 336998
Do not open definition, but actual found item, in QuickOpen.

Actually, I don't see how this could ever have worked differently...

BUG: 331810
Filter imported declarations from other project items.

These items would just be duplicated otherwise which is confusing.