Addition of undo and redo button on simple note

Components

Simple note is an open source note taking app. But when taking notes on Simple Notes,user makes an error. The is no way to redo or undo a particular event or mistake.

Proposal

I suggest that a "redo" and "undo" option be included on simple tool app to enable user to easily redo and undo error make during typing.

Mockups / Examples

Here is the default look of simple draw when user open it.

Here is the look of my suggestion of the undo and redo button on simple note.

Benefits

will make it easier for users to correct an error made while taking notes or making note on simple draw.