Allow (preferred) positioning (e.g., top,bottom) and size of pane to be defined via API
I would like to use the horizontal space right below the ribbons for an add-in. Right now the use can drag to left and right parts of the window. Top and bottom could really help with UX in my case.
The API should also allow to pin the pane to a position so it can't me moved by the user but e.g. resized in width (vertical pane) or height (horizontal position)
Defining size requirements height/width should also be possible as fixed value or min/max.