Add missing keyboard shortcut to dialog

Add missing keyboard shortcut to dialog swpossizepage.ui

Change-Id: Ie1e499af05e2a08432dd7649c0ffbe9ea0a12bf2
Reviewed-on: https://gerrit.libreoffice.org/6795Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

cui/uiconfig/ui/swpossizepage.ui

@@ -401,7 +401,7 @@
                     <property name="visible">True</property>
                     <property name="can_focus">False</property>
                     <property name="xalign">0</property>
-                    <property name="label" translatable="yes">by</property>
+                    <property name="label" translatable="yes">_by</property>
                     <property name="use_underline">True</property>
                     <property name="mnemonic_widget">byvert:0.00cm</property>
                   </object>
@@ -568,7 +568,7 @@
                 </child>
                 <child>
                   <object class="GtkCheckButton" id="followtextflow">
-                    <property name="label" translatable="yes">Follow text flow</property>
+                    <property name="label" translatable="yes">Follow te_xt flow</property>
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
                     <property name="receives_default">False</property>
@@ -626,7 +626,7 @@
                 <property name="column_homogeneous">True</property>
                 <child>
                   <object class="GtkCheckButton" id="pos">
-                    <property name="label" translatable="yes">Position</property>
+                    <property name="label" translatable="yes">Positio_n</property>
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
                     <property name="receives_default">False</property>