harmonize open raster and open vector UIs

src/ui/qgsgdalsourceselectbase.ui

@@ -11,7 +11,7 @@
    </rect>
   </property>
   <property name="windowTitle">
-   <string>Add Layer(s) from a Server</string>
+   <string>Add Raster Layer(s)</string>
   </property>
   <property name="windowIcon">
    <iconset>
@@ -24,17 +24,32 @@
    <bool>true</bool>
   </property>
   <layout class="QGridLayout" name="gridLayout_2">
-   <item row="3" column="0">
-    <widget class="QDialogButtonBox" name="buttonBox">
-     <property name="standardButtons">
-      <set>QDialogButtonBox::Help</set>
+   <item row="0" column="0">
+    <widget class="QGroupBox" name="srcGroupBox_1">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="title">
+      <string>Source</string>
      </property>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QLabel" name="label">
+        <property name="text">
+         <string>Dataset</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QgsFileWidget" name="mQgsFileWidget"/>
+      </item>
+     </layout>
     </widget>
    </item>
    <item row="1" column="0">
-    <widget class="QgsFileWidget" name="mQgsFileWidget"/>
-   </item>
-   <item row="2" column="0">
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
@@ -47,10 +62,10 @@
      </property>
     </spacer>
    </item>
-   <item row="0" column="0">
-    <widget class="QLabel" name="label">
-     <property name="text">
-      <string>Path to a raster data source</string>
+   <item row="2" column="0">
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Help</set>
      </property>
     </widget>
    </item>

src/ui/qgsogrsourceselectbase.ui

@@ -127,9 +127,9 @@
        </widget>
       </item>
       <item row="1" column="3">
-       <widget class="QPushButton" name="buttonSelectSrc">
+       <widget class="QToolButton" name="buttonSelectSrc">
         <property name="text">
-         <string>Browse</string>
+         <string>…</string>
         </property>
        </widget>
       </item>