JBIDE-14412 jQuery Mobile wizards do not show descriptions

Prevented overriding wizard description by empty message.
JBIDE-14416 - runtime extension manager method to find alternate id's for downloadRuntime objects not working
BUILD FAIL - stacks not added to site, causing ASTools to fail build. Was not visible in local build
BUILD FAIL again - sorry. Bad site/category.xml due to missing a feature
JBIDE-14465 common.model.ui.test fails with Kepler M7 TP

preference page is not loaded because compatibility layer
is missing during tests execution
Fixing stacks test case, using potential new pre-stacks.yaml file
JBIDE-14444 Drag & Drop of image into HTML editor - h:image