[JBIDE-16104] only refresh viewer when loading keys was succesful
JBIDE-17227 Application wizard: unchecking "Use default source code" wont enable "Source code" text field

Added method setUseInitialGitUrl
JBIDE-17227 Application wizard: unchecking "Use default source code" wont enable "Source code" text field
[JBIDE-17227] fixing source code checkbox and text enablement