Preview size not preserved in Save Screenshot for multiple views
Steps:
* Start paraview, builtin
* from view | preview, choose 1280x800 -- any size larger than your window size. You shuold get a "requested resolution too big for window" prompt. hit ok.
* select file | save screenshot and pick a filename. The **Save Screenshot Options** dialog shows incorrect window size. Hit the  button and then it shows the correct size. This is a bug.
issue