tdf#113880 Fix a11y issues in tabs of the image properties dialog

Change-Id: Ief5b95307cefe1091854ba872c37a702fe432b20
Reviewed-on: https://gerrit.libreoffice.org/45121Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sw/uiconfig/swriter/ui/columnpage.ui

@@ -699,6 +699,7 @@
                                 <property name="no_show_all">True</property>
                                 <property name="label" translatable="yes" context="columnpage|applytoft">_Apply to:</property>
                                 <property name="use_underline">True</property>
+                                <property name="mnemonic_widget">applytolb</property>
                                 <property name="xalign">1</property>
                               </object>
                               <packing>
@@ -723,6 +724,7 @@
                                 <property name="no_show_all">True</property>
                                 <property name="label" translatable="yes" context="columnpage|textdirectionft">Text _direction:</property>
                                 <property name="use_underline">True</property>
+                                <property name="mnemonic_widget">textdirectionlb</property>
                                 <property name="xalign">1</property>
                               </object>
                               <packing>

sw/uiconfig/swriter/ui/frmaddpage.ui

@@ -205,6 +205,7 @@
                     <property name="can_focus">False</property>
                     <property name="label" translatable="yes" context="frmaddpage|description_label">_Description:</property>
                     <property name="use_underline">True</property>
+                    <property name="mnemonic_widget">description:border</property>
                     <property name="xalign">0</property>
                   </object>
                   <packing>