dag: Use connect_button()

Signed-off-by: David Aguilar <davvid@gmail.com>

Author: davvid

cola/dag/view.py

@@ -570,6 +570,7 @@ def __init__(self, model, dag, parent=None, args=None):
 
         qtutils.connect_button(self.zoom_in, self.graphview.zoom_in)
         qtutils.connect_button(self.zoom_out, self.graphview.zoom_out)
+        qtutils.connect_button(self.displaybutton, self.display)
 
         self.thread.connect(self.thread, self.thread.commits_ready,
                             self.add_commits)
@@ -590,9 +591,6 @@ def __init__(self, model, dag, parent=None, args=None):
         self.connect(self.maxresults, SIGNAL('editingFinished()'),
                      self.display)
 
-        self.connect(self.displaybutton, SIGNAL('pressed()'),
-                     self.display)
-
         self.connect(self.revtext, SIGNAL('ref_changed'),
                      self.display)