Add navigation buttons, left & right, in toolbar above keyboard on mobile

Would be great to have navigation buttons, left and right, in the toolbar above the mobile keyboard.

It helps to set the caret in the correct location when tapping on a sentence.

In addition to this it would be good to be able to select which buttons you want to have on the toolbar. Currently the toolbar has already a lot of options and then you can remove the buttons you don’t use often to keep the toolbar simple and more useful.