Replaced compatible qooxdoo-version "trunk" with "1.2-pre". Of course…

…, unlike qooxdoo releases like 1.0.1 or 1.1 this still doesn't specify a distinct SVN revision, but contains more info: a "1.2-pre" means that the contrib is supposed to still work after the 1.1 release and towards (ultimatively for) the 1.2. For the generic "trunk" one couldn't tell later "what" trunk the contribution targeted at that time, i.e. between what releases.

git-svn-id: https://qooxdoo-contrib.svn.sourceforge.net/svnroot/qooxdoo-contrib@20502 09f7d036-9b2a-0410-8fbe-9cff4eb17569

Manifest.json

@@ -18,7 +18,7 @@
     ],
 
     "version" : "trunk",
-    "qooxdoo-versions": ["trunk"]
+    "qooxdoo-versions": ["1.2-pre"]
   },
 
   "provides" : 

demo/default/Manifest.json

@@ -18,7 +18,7 @@
     ],
 
     "version" : "trunk",
-    "qooxdoo-versions": ["1.0","trunk"]
+    "qooxdoo-versions": ["1.0","1.2-pre"]
   },
 
   "provides" :