fdo#72967 Draw position size tab - min size is 0 not 1 (mm)

Adjustment for size of an object had the minimum set to 1 (mm)
instead of 0.

Change-Id: I7d4c0998d2987448cea0fd7934649c02a513ac06

cui/uiconfig/ui/possizetabpage.ui

@@ -500,7 +500,6 @@
     <property name="page_increment">10</property>
   </object>
   <object class="GtkAdjustment" id="adjustmentSIZE">
-    <property name="lower">1</property>
     <property name="upper">100</property>
     <property name="step_increment">1</property>
     <property name="page_increment">10</property>