I do agree that it's frustrating not to have this functionality everywhere. (One minor trick to make some of it a little less painful is that in CUA mode [i.e.

I do agree that it's frustrating not to have this functionality everywhere. (One minor trick to make some of it a little less painful is that in CUA mode [i.e. MS mode], for Control-A, Control-E, you can type Control-A (=select all) and then Left to jump to the left edge, and Control-A and then Right to jump to the right of a text box).