Tiny viewer in Grading module when using tall compositions

It would be nice to be able to resize the viewer to fill the vertical space with my image when grading a tall composition.

Especially on an ultra wide monitor it's quite unfortunate I can't get a nice large view of the shot I'm grading.
The waveform in my screenshot could easily be half the size horizontally to let me make the viewer larger.
The viewer is the maximum horizontal width it can be in the screenshot.

Beta 3? If so I guess they missed this one with the ultra widescreen fix.

Also, they need to move the viewer to the left side to be closer to the color wheels.