Improve JavaScript line comments - ignore empty lines

[dndrsn]

When commenting out multiple lines with line comments (cmd + /), empty lines in the selection will get comments and the space on those lines will affect the indent level of the comments. For example this...

If the line in the middle has whitespace the indent of the comments is better...

Ideally, the whitespace only lines would be completely ignored and no comments would be added to the empty lines at all. It appears to be an issue with the core Sublime JS syntax. Other syntaxes like C# don't have this issue. If the syntax is changed to C#...

Which, to me, is ideal. Would be great to fix this behavior if possible.