[meld] Add tooltip to scrolling lock button (bgo#699111)

[Kai Willadsen <kaiw src gnome org>]

commit 98bf26ba7407ad436a75f972045fb6f217730e7f
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Mon Apr 29 06:39:43 2013 +1000

    Add tooltip to scrolling lock button (bgo#699111)

 data/ui/filediff.ui |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/ui/filediff.ui b/data/ui/filediff.ui
index ff97b71..8d45dde 100644
--- a/data/ui/filediff.ui
+++ b/data/ui/filediff.ui
@@ -494,6 +494,7 @@
                 <property name="can_focus">False</property>
                 <property name="relief">none</property>
                 <signal handler="on_lock_button_toggled" name="toggled"/>
+                <property name="tooltip-text" translatable="yes">Lock scrolling of all panes</property>
                 <child>
                       <object class="GtkImage" id="lock_button_image">
                         <property name="visible">True</property>