Feat: Add Undo and Redo Buttons in GridPaint Activity

[Devmoni]

Description

Currently, the activity lacks the ability to undo or redo actions, which can be tough for users who make mistakes or want to revert changes. Adding undo and redo buttons will enhance the user experience by providing more control over the drawing process.

[Devmoni]

I have already implemented this and am waiting for the verification of the issue.
Please review @llaske
Thanks...

[llaske]

GridPaint is the most used activity by young children.
I don't want to add complexity in the UX. Plus, it's very easy to redraw something.
So I don't think we need an undo/redo feature.

[Devmoni]

I respect your decision.
However, considering that the clear-button removes all painted blocks, having an undo/redo feature could be useful for correcting small mistakes without needing to start over.
This functionality is already available in various activities on Sugarizer.

[Devmoni]

GridPaint is the most used activity by young children. I don't want to add complexity in the UX. Plus, it's very easy to redraw something. So I don't think we need an undo/redo feature.

I agree that one extra button will get added in the UI but IMO its worth adding one button somewhere it will increase the ease to draw something.
Moreover nowadays undo/redo feature is used everywhere teaching young children how to use it from an early age will certainly be beneficial.
Thanks...