app/res:launcher:: fix size problem
app:launcher:: fix launcher position and size problem on multi-screen.
Merge branch 'launcher_wrong' into develop

Conflicts:
	app/launcher/launcher.c

fix launcher position and size porblem.
res:dock:: fix preview problem.

the title of preview is not updated.
app/res:dock:: fix preview problem.

1. gets wrong window size.
2. the preview of movie sucks.

reason:
1. gdk_window_get_width/height get wrong size.
2. the timeout to refresh is 500ms.

solution:
1. using XGetWindowAttributes instead of gdk_window_get_width/height.
2.1 using 60ms instead of 500ms.
2.2 not refreshing on moving.