clearer options group warning (#661)

aqt/deckconf.py

@@ -91,8 +91,12 @@ class DeckConf(QDialog):
                 continue
             if d['conf'] == conf['id']:
                 cnt += 1
-        self.form.count.setText(ngettext("%d deck uses this options group", \
-                "%d decks use this options group", cnt) % cnt)
+        if cnt > 1:
+            txt = _("Your changes will affect multiple decks. If you wish to "
+            "change only the current deck, please add a new options group first.")
+        else:
+            txt = ""
+        self.form.count.setText(txt)
 
     def addGroup(self):
         name = getOnlyText(_("New options group name:"))

designer/dconf.ui

@@ -57,12 +57,18 @@
    </item>
    <item>
     <widget class="QLabel" name="count">
+     <property name="styleSheet">
+      <string notr="true">* { color: red }</string>
+     </property>
      <property name="text">
       <string/>
      </property>
      <property name="alignment">
       <set>Qt::AlignCenter</set>
      </property>
+     <property name="wordWrap">
+      <bool>true</bool>
+     </property>
     </widget>
    </item>
    <item>