[Enhancement] Better parenthesis support

[xposure]

I run in to this all the time, I will hit backspace then ( to bring up the tooltip for the method and this will add an addition parenthesis.

[xposure]

An example of ) being eaten even though there aren't the correct number.

[bfiete]

Neither VS nor VSCode operate on "are there enough parentheses" as their metric. VS has different behavior depending on whether you manually move the cursor around after inserting parentheses which breaks out of the "paired parens" mode, it's kinda weird. VSCode will just ALWAYS delete the () pair when you delete the first (, which is probably a good solution.

[bfiete]

This has been revised at 743a8da
Also the feature where pressing ')' to move through a closing paren is different too. Basically there's a "recently inserted parentheses list" which is used for determining whether to insert a paren pair and to move through a closing paren. Manually moving the cursor clears that list.