* Only apply TS Dot Accept Suggestion if previous character is a valid identifier char

Fixes #17825
Fixes #17770
Fixes #17584

**Bug**
When typing two or more `.` in a row, we end up unexpectedly accepting suggestions in TS files. This is caused by the custom keybinding that ts registers for `.`.

**Fix**
Only accept the suggestion on `.` if the previous character is a valid identifier character.

* Move title to nls

Part of #15583

This brings in disableStdio option (Part of #15583)

Menu shows "No Configurations" when .vscode folder is on the root of the drive and the root drive is opened in VS Code (fixes #18183)

Re use readonly #12732 #13863

Fixes #18262: interpret languages with empty aliases array as languages that don't want to show up in the picker

New tokens format & theme matching 

Add config setting to control whether alt should show the menu bar