[applet/notes] Don't focus buttons on click
requested to merge ngraham/kdeplasma-addons:dont-defocus-sticky-note-buttons-inappropriately into master
Otherwise the text field loses focus and typing causes KRunner to intercept the keystrokes. Instead, only allow the buttons to gain focus when manually focused using the tab key.
BUG: 437828 FIXED-IN: 5.22.1