* Add icons for Database Import, Database Export, and Recent Databases
* Change app exit icon to be distinct from export icon
* Updated and ran makeappicons.sh
* Remove repeat password on entry edit
* Move show/hide password and password generator buttons into the field as actions.
* Register keyboard shortcut Ctrl+H to toggle password visibility
* Register keyboard shortcut Ctrl+G to open the password generator
* Cleanup code and improve interactions between elements
* Simplify Password Generator button layout; convert advanced mode button to toggle button
* Update GUI tests
* Fixes#4120