shortcut ability for "Use pen pressure" option in brush dialog box

Within the brush tool:

When working with a pen tablet (Wacom for instance), it is generally useful to have the pression sensitive toggled on to have more accuracy at the tip point.

Sometimes, for straight lines, it's preferable to use the straight line with the shift key pressed.
But that doesn't work properly if "use pen pression" is on.

Can we add the ability to toggle that detail option on/off with a short cut?