Make it easier (single button or keystroke) to clear text from the search box on the main window
I would like to have a single button to clear the search box (default: Subject or Sender Contains:) Many applications I use have text search boxes, which when you start typing, get a black square with a bulge on the left with a white X show up a the right end of the box. Click it, and it clears anything you have typed. Hitting a single button to clear the field is easier than selecting the entire contents and then hitting "Del".
Peter Bloomfield said on the mailing list: Perhaps the text should be selected when the search completes; then typing anything would first clear it. Another avenue: Gtk has a GtkSearchBar widget that we've never explored; possibly we could use it to make Balsa's search options more consistent with other Gtk-based apps. I don't know if it works the way you would like, though.
Looking at the docs, I think GtkSearchBar (or is it Gtk.SearchBar?) is what I've seen elsewhere. (I assume it's a different widget in KDE (Qt) apps, but close enough.