Fix en_GB translation

translations/translation.qrc

@@ -1,7 +1,7 @@
 <RCC>
     <qresource prefix="/translations">
         <file>wfview_en.qm</file>
-        <file>wfview_gb.qm</file>
+        <file>wfview_en_GB.qm</file>
         <file>wfview_it.qm</file>
         <file>wfview_tr.qm</file>
         <file>wfview_de.qm</file>

wfview.pro

@@ -42,7 +42,7 @@ CONFIG(debug, release|debug) {
 }
 
 TRANSLATIONS += translations/wfview_en.ts \
-                translations/wfview_gb.ts \
+                translations/wfview_en_GB.ts \
                 translations/wfview_it.ts \
                 translations/wfview_tr.ts \
                 translations/wfview_de.ts \