XmlPsiManager should not increase tracker on changes in unrelated files

(cherry picked from commit 0c781807dbc2816cbf60cff54a4b5bc09175d3dc)
JsonTreeChangePreprocessor should not increase tracker on changes in unrelated files

(cherry picked from commit 4a6142a813d91233aba4616b91069de550bccaa8)
Asynchronous completion provider in TextFieldWithAutoCompletionContributor now correctly stops upon cancellation

(cherry picked from commit 87e37d35ff621c768bd6cc3c74ae41ba4c9e3604)