New bookmark system

[VitalRus95]

Another genius idea: remake the bookmark system. Currently, you have to use Ctrl+Shift+[1-9] to place or remove a numeric bookmark and Ctrl+[1-9] to move to it. It seems not convenient enough, especially in big script files where you may simply forget what number is what bookmark. If possible, it will be great to have a bookmark feature like that in Visual Studio, which supports named bookmarks and doesn't limit their count.

As always, thanks a lot for constantly improving Sanny Builder!