All Tracking-related Keyframes in Tracking-Dopesheet

There are two issues with the keyframes for tracking:

1. The tracking tools are using two different dopesheets: one the one hand for the normal tracking-points there is a special dopesheet in the movie editor and on the other hand the keyframes for the masks are in the conventional dopesheet. This is quiet inconsistent and a new user would expect to find all of them in ONE editor.

2. Other than the keyframes for normal tracking markers and masks, the keyframes for plane-tracks (altering of the shape-points) aren't shown in any dopesheet but just at the bottom edge of the movie editor. By that these are just editable by overwriting existing keyframes. Users would expect to find these also in a dopesheet-form and would expect to be able to edit them like every keyframe.