Yes, of course I did see the toolbar buttons. The problem is you have to move the mouse to access them, whereas if it was bound to default mouse navigation buttons, it would save a lot of unnecessary mouse movement.
Oh, I thought 'Ctrl+Left/Right' was the default. I will reassign it to 'Alt+Left/Right' then. But still, binding mouse navigation buttons (perhaps as an entirely separate option) would be great. To me, it seems that it would be something quite a standard thing to do.
And since, we are onto navigation, I thought I would mention it in passing: It would be nice that when multiple Task Lists are open, 'Ctrl+Tab' would work similarly to how it works in a typcial web browser or VS - cycling between tabs (Task Lists) in the order they have been used (as opposed to how they appear on the Tab bar). That way you can more quickly switch to Task List you have been working on previously.
Thank you.