Move 'searching...' indicator to more visible location

[JFoederer]

When using the 'Find usages' feature in RIDE, the search can take quite some time. More than once have I missed results, or wrongfully assumed there were no hits, due to the way the dialog indicates the search is still ongoing.

Currently the title of the dialog is used to display a 'searching...' text, but typically a user would be looking at the results table in the dialog.

A simple fix could be to reuse the 'searching...' text as indicator, but instead put it as the next row in the table. I am sure there a many other ways as well.

submitted on RIDE v2.0.8.1