cleanup
IDEA-123160 Find Usages doing nothing in 13.1
^174 "from my point of view it would be better to make inner MyFullValueEvaluator class static and change constructor signature to accept Value instead of int actualLength."
fix NPE
move JavaScriptDebugAware to community (required for kotlin&nashorn)

According to review, we use exiting, purely unrelated module — but we avoid creating yet another just for such class
seems html attributes spec is too aggressive, let's use alpha as attribute start