FE/Qt: Runtime UI: Update View menu icons (part #1).
FE/Qt: Rest of the icons update (color format fix).
FE/Qt: General Icon Update: Guest-screen manipulation icons.
FE/Qt4: small updates to some icons
FE/Qt4: make these icons really 16x16
FE/Qt: Icons update.
FE/Qt: Replaced toggle action icons with a new look (tiny checkbox overlaid) and added new Seamless mode icons (#3455).