GH-338, GH-513, GH-700 Unify edit instance with console window

* The resulting instance window can be closed at any point.
* Main window is kept open and running instances are marked with a badge.
* Multiple instances can now run from the same MultiMC - it's even more **multi** now.
* MultiMC can be entirely closed, keeping Minecraft(s) running.

application/resources/instances/instances.qrc

@@ -37,6 +37,7 @@
         <file>enderman.png</file>
         <file>herobrine.png</file>
         <file>derp.png</file>
+		<file>status-running.png</file>
 
 	<!-- Update. GPLv2, https://code.google.com/p/gnome-colors/ -->
 	<file>updateavailable.png</file>