Save button inside invoice or quotes

It would be nice to just have a save button only that keeps you inside of the invoice or quote. Right now the save button take you back to the list of invoices or list of quotes. Or it could be a drop down for “save”: Save (stays inside invoice), Save and return to list screen, save and preview.

We occasionally have trouble with the internet and I tend to save as i go so that i do not lose anything. It would be nice to have the reassurance that my work is saved.