lookandfeel: Use complementary color group for lock screen
lookandfeel: Use complementary color group for log out
Do not enable QtQuick Controls style for now

The code still need Fluid which is not yet available.
shell: Move clock to top panel

The top panel can covered by windows and it's supposed to be
completely transparent but that should probably be implemented
from QML.
lookandfeel: Fix password field colors
lookandfeel: Fix icon button color
lookandfeel: Fix icon button color in greeter