keep numbers as ints if they have no decimal portion

aqt/groupconf.py

@@ -88,6 +88,8 @@ class GroupConf(QDialog):
             try:
                 i = float(i)
                 assert i > 0
+                if i == int(i):
+                    i = int(i)
                 ret.append(i)
             except:
                 # invalid, don't update

designer/groupman.ui

@@ -58,7 +58,7 @@
       <enum>Qt::Vertical</enum>
      </property>
      <property name="standardButtons">
-      <set>QDialogButtonBox::Close|QDialogButtonBox::Help</set>
+      <set>QDialogButtonBox::Help|QDialogButtonBox::Ok</set>
      </property>
     </widget>
    </item>