Added order to snippet tab stops

fix 'shaddow' typo

Fixes an exception was being caused because the panel was not initialized
when calling into createNew. This also fixes multiple terminal instances being
spawned if the panel WAS initialized but contained 0 processes.

Fixes #8209

This change also consistently hides the terminal when exiting the final
terminal.

Fixes #8211

Merge branch 'FixMarkdownIssues' of git://github.com/rebornix/vscode into rebornix-FixMarkdownIssues

fixes #8121