This commit also avoids Locallab spot to disapear when adding lockable
color picker, pressing toolbar "hand" button, pressing h/H key. However,
if another tool button (ex: resizing tool) is pressed, this action is
considered
- The mouse cursor now is an open hand when hovering over something
which can be panned, e.g. the red square in the Navigator panel. It is
a crosshair when hovering over the main preview.
- When you pan the red square or the main preview, it's a closed hand.
- Now the cursor changes to a crop icon when you're in crop mode.
- The cursor changes as needed when you want to resize a crop edge or
corner.
- The cursor changes when you're in straighten mode.
- The curve "add adjustment point" and "edit node in/out values" icons
now contain a node in the icon and are more representative of what
they do.
- The small reset/undo icon is made a bit clearer.
