rename "Lathe Object" to "Rotation Object" in a tooltip

because the latter is always used in other places

Change-Id: I42c74cf24a900541aa866aec7bc70b1ea3162b10
Reviewed-on: https://gerrit.libreoffice.org/15873Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

svx/uiconfig/ui/docking3deffects.ui

@@ -708,7 +708,7 @@
                             <property name="visible">True</property>
                             <property name="can_focus">True</property>
                             <property name="receives_default">True</property>
-                            <property name="tooltip_text" translatable="yes">Convert to Lathe Object</property>
+                            <property name="tooltip_text" translatable="yes">Convert to Rotation Object</property>
                             <property name="image">image15</property>
                           </object>
                           <packing>