Chart view preview mode is blank when full resolution is not available
@patchett2002 @utkarsh.ayachit @cory.quammen
Found on Linux with Python 3 ParaView binary.
Reproducible on MacOS 10.13.6 (2800x1800 display resolution) with python 2 binary from: https://www.paraview.org/paraview-downloads/download.php?submit=Download&version=v5.8&type=binary&os=macOS&downloadFile=ParaView-5.8.1-RC2-MPI-OSX10.12-Python2.7-64bit.dmg
For at least the line chart view, the preview mode is blank when the render window is not big enough to show the full resolution preview.
Steps to reproduce: