entry: Don't clear when setting icons
entry: Don't clear when setting icons

Clearing the icon doesn't appear to be necessary with
todays code, and it has the unfortunate side-effect of
temoorarily hiding the icon's window, which breaks grabs
and makes us miss the button release event when the icon
is changed from a button press handler.

grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita