Revert "No need to search i18n() in the same folder twice"

This reverts commit 85fea53760.

this is needed because it takes translation strings from app/dock
folder also

app/Messages.sh

@@ -1,4 +1,4 @@
 #! /usr/bin/env bash
 $EXTRACTRC `find . -name \*.rc -o -name \*.ui` >> rc.cpp
 
-$XGETTEXT `find . ../shell -name \*.js -o -name \*.qml -o -name \*.cpp` -o $podir/latte-dock.pot
+$XGETTEXT `find . ../shell -name \*.js -o -name \*.qml -o -name \*.cpp -o -name ./dock\/\*.cpp` -o $podir/latte-dock.pot