Fixes icons not displaying in AudioControlsEditor (#1596)

The qrc files appeared to be set up correctly, but needed to add a
Q_INIT_RESOURCE call to the code.

Gems/AudioEngineWwise/Code/Source/Editor/AudioSystemEditor_wwise.cpp

@@ -23,6 +23,11 @@
 #include <CryPath.h>
 #include <Util/PathUtil.h>
 
+void InitWwiseResources()
+{
+    Q_INIT_RESOURCE(EditorWwise);
+}
+
 namespace AudioControls
 {
     //-------------------------------------------------------------------------------------------//
@@ -80,6 +85,12 @@ namespace AudioControls
         return "";
     }
 
+    //-------------------------------------------------------------------------------------------//
+    CAudioSystemEditor_wwise::CAudioSystemEditor_wwise()
+    {
+        InitWwiseResources();
+    }
+
     //-------------------------------------------------------------------------------------------//
     void CAudioSystemEditor_wwise::Reload()
     {