add xsettings
keybinding: modify add custom accel func
grub2: return simple entry titles which in level one
grub2: remove property Background in Grub2
grub2: hide interface Load()
grub2: refactoring code
xsettings: test new window
xsettings: update window
display: remove border property support
display: set mirrormode as defualt
display:  install dbusobject as early as possible
display: improve output plug/unplguin handle
display: workaround nvidia output
xsettings: test
mounts: get disk cap
mounts: return size by byte
mounts: clean code
desktop: fixed area action
grub2: refactor code, make Theme indenpendent from ThemeManager
grub2: add property 'EnabledTheme' to ThemeManager, add util/newError()