Finish app modernization

app/src/main/res/values/themes.xml

@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-    <style name="TraccarTheme" parent="android:Theme.Light">
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <item name="colorPrimary">@color/primary</item>
+        <item name="colorPrimaryDark">@color/primary_dark</item>
+        <item name="colorAccent">@color/accent</item>
     </style>
 
 </resources>