Roster: Improve contact filter look

gajim/data/gui/roster_window.ui

@@ -115,12 +115,11 @@
                 <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
                 <property name="orientation">vertical</property>
                 <child>
-                  <object class="GtkEntry" id="rfilter_entry">
+                  <object class="GtkSearchEntry" id="rfilter_entry">
                     <property name="can_focus">True</property>
                     <property name="no_show_all">True</property>
                     <property name="editable">False</property>
-                    <property name="primary_icon_name">edit-clear</property>
-                    <signal name="changed" handler="on_rfilter_entry_changed" swapped="no"/>
+                    <signal name="search-changed" handler="on_rfilter_entry_changed" swapped="no"/>
                     <signal name="icon-press" handler="on_rfilter_entry_icon_press" swapped="no"/>
                   </object>
                   <packing>