Fix dialog layout

src/ui/QGCMapRCToParamDialog.ui

@@ -7,37 +7,14 @@
     <x>0</x>
     <y>0</y>
     <width>400</width>
-    <height>315</height>
+    <height>358</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>Dialog</string>
   </property>
-  <widget class="QDialogButtonBox" name="buttonBox">
-   <property name="geometry">
-    <rect>
-     <x>30</x>
-     <y>280</y>
-     <width>341</width>
-     <height>32</height>
-    </rect>
-   </property>
-   <property name="orientation">
-    <enum>Qt::Horizontal</enum>
-   </property>
-   <property name="standardButtons">
-    <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
-   </property>
-  </widget>
-  <widget class="QWidget" name="formLayoutWidget">
-   <property name="geometry">
-    <rect>
-     <x>9</x>
-     <y>9</y>
-     <width>381</width>
-     <height>296</height>
-    </rect>
-   </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
     <layout class="QFormLayout" name="formLayout">
      <property name="fieldGrowthPolicy">
       <enum>QFormLayout::AllNonFixedFieldsGrow</enum>
@@ -213,7 +190,18 @@
       </widget>
      </item>
     </layout>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
     </widget>
+   </item>
+  </layout>
  </widget>
  <resources/>
  <connections>