Fix validation marker creation

Create a validation constraint for java getter expression

Create a validation constraint for java setter operator

BS-13505 As Dave, when my contract is empty (pool and task) and I click

on the UI designer button, I need a warning

wording "anymore" by "again" 

on the UI designer button, I need a warning

add a popup when there is no contract input and form does not exist.

add tests

BS-13453: open information dialog when clicking on UI designer in