Bug 455323 - Remove unneeded dependencies from o.e.swt.tools

Remove unneeded Require-Bundle and Import-Package. 

Change-Id: I4c999990b3fae5661bdce8601ed4ddae1649a6f4
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
v4509
Bug 428852 - DND Gtk3 fix

In gtk3, gdk no longer sends motion events when the thread sleeps 
when a drag has not begun yet.
To work around this change, we detect our own motion from the SWT side.

Change-Id: Ia75a3c48148c458c54eddec3466151a4ac7cf6f5
Signed-off-by: Leo Ufimtsev <lufimtse@redhat.com>