JBIDE-16321 Smart DnD from jQuery Mobile Palette

Extended drop position correction to allow each palette item
to define its own rules.
JBDS-2996 - Runtime search messages written to stdout when a new runtime is added in JBDS8.beta1
[JBIDE-17220]Sometimes 'Experimental Features' of JBoss Tools gets visible in Preferences

add model.ui.capabilities bundle to model requirements
Merge branch 'master' of github.com:jbosstools/jbosstools-base