CA-270499: The license text on the title bar is flickering
CA-270499: The license text on the title bar is flickering

Fixed flickering that occurred due to the repetitive re-setting of the label's text.

Signed-off-by: Gabor Apati-Nagy <fea1aad7ceb67d3aeb88acb6b51e51467c21418e@citrix.com>

kc284/xenadmin,minli1/xenadmin,stephen-turner/xenadmin,kc284/xenadmin,minli1/xenadmin,minli1/xenadmin,MihaelaStoica/xenadmin,stephen-turner/xenadmin,xenserver/xenadmin,minli1/xenadmin,xenserver/xenadmin,stephen-turner/xenadmin,kc284/xenadmin,MihaelaStoica/xenadmin,stephen-turner/xenadmin,MihaelaStoica/xenadmin,stephen-turner/xenadmin,kc284/xenadmin,MihaelaStoica/xenadmin,minli1/xenadmin,xenserver/xenadmin,kc284/xenadmin,stephen-turner/xenadmin,minli1/xenadmin,MihaelaStoica/xenadmin,MihaelaStoica/xenadmin