vertical mode --> https://cdn.pbrd.co/images/Httqfckm.png
horizontal mode --> https://cdn.pbrd.co/images/HttsvCT.png
On hovering over undo and redo buttons with scale them to 1.1
Undo and Redo tools are still broken. I am working on them.
be careful on the size of the "bar", sometimes the icons are not visible: https://pasteboard.co/HtQX753.png
Horizontal mode -- https://pasteboard.co/HxAZ8Jl.png
Vertical mode -- https://pasteboard.co/HxB0Fp3.png , https://pasteboard.co/HxB0YxZ.png