toolbar.ui:Fix keyboard access to buttons
requested to merge c.lobrano/nautilus:issue569/fix-keyboard-access-to-some-headerbar-buttons into master
Currently back_button, forward_button and app_button (hamburger button) are not accessible via keyboard.
This commit fixes this changing the property can_focus from False to True for the above mentioned buttons.
Fixes: #569 (closed)
Edited by Carlo Lobrano