UI: Add icons to tabs.

src/ui/fort_images.qrc

@@ -1,6 +1,10 @@
 <!DOCTYPE RCC><RCC version="1.0">
 <qresource>
+    <file>images/application_cascade.png</file>
+    <file>images/application_double.png</file>
     <file>images/cog.png</file>
+    <file>images/link.png</file>
     <file>images/shield.png</file>
+    <file>images/zoom.png</file>
 </qresource>
 </RCC>

src/ui/qml/pages/ApplicationsPage.qml

@@ -95,9 +95,10 @@ BasePage {
                 model: appGroups
 
                 TabButton {
-                    width: Math.max(70, implicitWidth)
+                    width: Math.max(100, implicitWidth)
                     font.bold: checked
                     text: appGroup.name
+                    icon.source: "qrc:/images/application_double.png"
 
                     readonly property AppGroup appGroup: modelData
                 }

src/ui/qml/pages/MainPage.qml

@@ -20,15 +20,19 @@ Page {
 
         TabButton {
             text: QT_TRANSLATE_NOOP("qml", "Options")
+            icon.source: "qrc:/images/cog.png"
         }
         TabButton {
             text: QT_TRANSLATE_NOOP("qml", "IPv4 Addresses")
+            icon.source: "qrc:/images/link.png"
         }
         TabButton {
             text: QT_TRANSLATE_NOOP("qml", "Applications")
+            icon.source: "qrc:/images/application_cascade.png"
         }
         TabButton {
             text: QT_TRANSLATE_NOOP("qml", "Activity")
+            icon.source: "qrc:/images/zoom.png"
         }
     }