[gitg] Add button-press/release event masks to progress bin

[Jesse van den Kieboom <jessevdk src gnome org>]

commit f10fe5ea6c901bf4d1b1c4d2dac053a2a729bc07
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Wed Aug 20 11:18:37 2014 +0200

    Add button-press/release event masks to progress bin

 libgitg/gitg-progress-bin.vala |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/libgitg/gitg-progress-bin.vala b/libgitg/gitg-progress-bin.vala
index 6dcfaa3..61ef043 100644
--- a/libgitg/gitg-progress-bin.vala
+++ b/libgitg/gitg-progress-bin.vala
@@ -53,7 +53,10 @@ namespace Gitg
                        attributes.height = allocation.height;
                        attributes.window_type = Gdk.WindowType.CHILD;
                        attributes.wclass = Gdk.WindowWindowClass.INPUT_OUTPUT;
-                       attributes.event_mask = get_events() | Gdk.EventMask.EXPOSURE_MASK;
+                       attributes.event_mask = get_events() |
+                                               Gdk.EventMask.EXPOSURE_MASK |
+                                               Gdk.EventMask.BUTTON_PRESS_MASK |
+                                               Gdk.EventMask.BUTTON_RELEASE_MASK;
 
                        var attributes_mask = Gdk.WindowAttributesType.X | Gdk.WindowAttributesType.Y;
                        var window = new Gdk.Window(get_parent_window(),