JBIDE-16870 - Remove "Tech Preview" designation from Hybrid Mobile Tools and CordovaSim

removes tech preview from feaure.properties
JBIDE-17436 - Hints for id and name fields 

Adds messages to id and name fields on new Hybrid project wizard.
JBIDE-17482 - Listing of the Cordova plugins do not work behind a proxy

Carry proxy setting to HttpClient when making calls for retrieving data from cordova registry.
handle unconfigured proxies

handles the case when a proxy can not be determined
JBIDE-17589 - Import of Cordova project fails when the project is
located in the workspace

Adds validations to project location.
Specifying JavaFx as default web engine
CordovaSim is not launched on Linux with GTK3 and Oracle JVM

fixed
Merge pull request #60 from kmarmaliykov/gtk3_fix

CordovaSim is not launched on Linux with GTK3 and Oracle JVM
Merge pull request #61 from ibuziuk/javaFxDefault

Specifying JavaFX as default web engine
Disable OK button 

Disabled the download button before starting the download.
JBIDE-16581 CordovaSim: Removing 'About' and adding 'Preferences' for Mac OS context menu
Merge pull request #62 from ibuziuk/JBIDE-16581

JBIDE-16581 CordovaSim: Removing 'About' and adding 'Preferences' for Mac OS context menu