* Workaround for #16909

Fixes #16909

Worksaround TS2.1+ returning strings in the occurrences response we use for highlighting occurrences in documents

The workaround is to look at the text surrounding the first occurrence to see if it is a string literal.

* Small cleanup

* Add gate for ts 2.1.x

* Added check to make sure we don't compare the same character

Issue #2092

**bug**
With typescript.useCodeSnippetsOnMethodSuggest enabled, we will automatically complete function calls inside some contexts where they should not be completed. For example,  destructing assigment.

**fix**
Add a quickinfo check on the position before attempting to insert a function call. Create a blacklist of invalid contexts. Otherwise, assume that we want to complete the function call.

fixes #8575

Fix #16949

fixes #17008

Standardize cursor movement with home and end keys

related to #15558