Allow esc to close AbstractFormDialog
Allow esc to close AbstractFormDialog

Add handling to AbstractFormDialog so that they can be closed
with the escape key.

(For example when adding Global Exclude URLs)
psiinon/zaproxy,thc202/zaproxy,thc202/zaproxy,zapbot/zaproxy,meitar/zaproxy,thc202/zaproxy,zaproxy/zaproxy,zapbot/zaproxy,meitar/zaproxy,gmaran23/zaproxy,zaproxy/zaproxy,meitar/zaproxy,gmaran23/zaproxy,kingthorin/zaproxy,thc202/zaproxy,gmaran23/zaproxy,zapbot/zaproxy,meitar/zaproxy,thc202/zaproxy,psiinon/zaproxy,gsavastano/zaproxy,zaproxy/zaproxy,psiinon/zaproxy,gsavastano/zaproxy,Ali-Razmjoo/zaproxy,gsavastano/zaproxy,thc202/zaproxy,gmaran23/zaproxy,gsavastano/zaproxy,gsavastano/zaproxy,zaproxy/zaproxy,Ali-Razmjoo/zaproxy,zapbot/zaproxy,Ali-Razmjoo/zaproxy,zaproxy/zaproxy,thc202/zaproxy,meitar/zaproxy,kingthorin/zaproxy,zaproxy/zaproxy,psiinon/zaproxy,Ali-Razmjoo/zaproxy,psiinon/zaproxy,zapbot/zaproxy,psiinon/zaproxy,meitar/zaproxy,meitar/zaproxy,kingthorin/zaproxy,gmaran23/zaproxy,Ali-Razmjoo/zaproxy,gsavastano/zaproxy,zapbot/zaproxy,kingthorin/zaproxy,zapbot/zaproxy,kingthorin/zaproxy,gmaran23/zaproxy,gsavastano/zaproxy,zaproxy/zaproxy,kingthorin/zaproxy,gmaran23/zaproxy,psiinon/zaproxy,Ali-Razmjoo/zaproxy,meitar/zaproxy,Ali-Razmjoo/zaproxy,kingthorin/zaproxy