[Bug] The 'Search Files...' results-dropdown remains open when switching main-view

[goran-w]

• On the Files tab in History view, the Search Files... textbox displays its search-results in a dropdown.
• If we navigate to another main-view (Local Changes or Stashes) without first closing this dropdown (by selecting an item, clicking the clear-button, pressing ESC etc), then the dropdown is not closed.
• Instead it remains hovering, over unrelated panels in the new view...

In History view:

After switching to Local Changes view:

[Mingun]

The same is applied to the auto-pop-up for completions in commit message editor as well. For example, if you make commit with the message "fix", then SourceGit will show pop-up for auto-completion on other pages, as if the commit message editor is visible.