Go to private/public checkbox without using mouse

[dreyZZ]

When adding new gist, after pasting the code, i can not go to private checkbox or '#add file' input without using mouse (Because tab used for indentation in the text area). This slows down the saving process.

Solutions:

• Checkbox can be added before the code textarea. (Not a solution for '#add file' input)
• A shortcut can be added to quit text area.