Cinema 'Export Now' exports incorrect float (recolorable) images
Float images exported contain only ```Nan``` values.
Attached is a folder containing files to run the following test, which shows the bug:
[float_bug.zip](/uploads/6d8bf3eb690eda591e0d0b2a6083a4c0/float_bug.zip)
- open ParaView
- load small.csv
- close the table view window that is created
- add TableToStructuredGrid filter, setting the following:
- Whole extents to 0,1 0,1 0,0
- 'X column' to x
- 'Y column' to y
- 'Z column' to z
- Coloring to 'scalar'
- Zoom so that the data fills the entire view (there is no background showing)
- run the ```test.xml``` script
- Change the 'Root Directory' field to export ```test.cdb``` to this test directory
- File->Export Now
- run ```uncompress``` script
- this will produce one ```raw``` files:
- ```uncompressed_scalar.raw```
- ```uncompressed_depth.raw```
- run ```od -f uncompressed_scalar.raw```
- this shows that the resulting uncompressed image contains only ```NaN``` values
issue