JBIDE-15178 Errors when closing and reopening a maven project

Do not add 'lib' file system if WEB-INF/lib folder
does not exist in the project.
JBIDE-15186 JBoss Tools JSP Editor is slowed by selectionBar.updateNodes

Always run update in a delayed job.
JBIDE-15249 No scroll at dnd to text editor of JBoss Tools HTML editor

Assignment event.feedback is moved to the proper place.
JBIDE-15257 JBoss Tools JSP Editor is slowed by JSPTextEditor.handleCursorPositionChanged

Restored implementation as before changes done to JBIDE-7059.
JBIDE-15255 OpenOns "Open with Browser" and "Open with BrowserSim" should work with any tags with attribute data-role="page" not only with tag div

removed check on tag div
JBIDE-15194 Wrong text formating when inserting a code snippet from jQuery Mobile palette

Updated InsertJSCSSPaletteEntryTest