Tools -> Record Test does nothing when filename has "." before .xml

@utkarsh.ayachit @cory.quammen

Found with master build from source. MacOS 10.13.6

Record Test seems to do nothing when the output file has a "." before ".xml". I think there should at least be some output to tell the user why nothing happened.

To reproduce the failure:

1. Start a clean paraview
2. Tools -> Record Test
3. Save as "test.1.xml"

There's no output and the window with record controls doesn't pop up.

To reproduce success:

1. Start a clean paraview
2. Tools -> Record Test
3. Save as "test1.xml"

The window with record controls does pop up: