Fixes for raster layer save as dialog

- Initial show of very long CRS no longer makes combobox too wide
- Remove min height for nodata groupbox, possible cause for not fully collapsing

Author: dakcarto

src/ui/qgsrasterlayersaveasdialogbase.ui

@@ -146,11 +146,17 @@
      <item>
       <widget class="QComboBox" name="mCrsComboBox">
        <property name="sizePolicy">
-        <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+        <sizepolicy hsizetype="Maximum" vsizetype="Fixed">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
+       <property name="minimumSize">
+        <size>
+         <width>250</width>
+         <height>0</height>
+        </size>
+       </property>
       </widget>
      </item>
      <item>
@@ -565,7 +571,7 @@
             <property name="minimumSize">
              <size>
               <width>0</width>
-              <height>100</height>
+              <height>0</height>
              </size>
             </property>
            </widget>