Added libappindicator3-dev and kdelibs-dev as build dependency.

Downgrade to Qt4 since Qt5 5.2.0 on Ubuntu 14.04 has a bug with harbuzz and japanese characters.

src/forms/configwidget.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>520</width>
-    <height>439</height>
+    <width>532</width>
+    <height>457</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -30,6 +30,11 @@
           <layout class="QVBoxLayout" name="verticalLayout_2">
            <item>
             <widget class="QLabel" name="label">
+             <property name="font">
+              <font>
+               <pointsize>10</pointsize>
+              </font>
+             </property>
              <property name="text">
               <string>Specify the folders that the PS Vita will access for each content type.</string>
              </property>
@@ -236,6 +241,19 @@
                </item>
               </layout>
              </item>
+             <item>
+              <spacer name="verticalSpacer_2">
+               <property name="orientation">
+                <enum>Qt::Vertical</enum>
+               </property>
+               <property name="sizeHint" stdset="0">
+                <size>
+                 <width>20</width>
+                 <height>40</height>
+                </size>
+               </property>
+              </spacer>
+             </item>
             </layout>
            </item>
           </layout>