BUG #14186: Fix issues with scaling for point sprites.

The problem was arising from the fact that the properties for selecting array to
scale radius or opacity by were being set to default values prematurely. Due to
the extensive custom logic in the point sprites code, setting the array names
was not sufficient and caused inconsistencies between what was shown in the UI
and what was happening under the covers. Fixed the issue by ensure that by
default, we don't scale my any array.

Also fixed issue with loading state, where the radius range was getting reset
when the panel was created for a visualization loaded from state files.

Change-Id: Icc19ad145cafb2cfed59e88c617e931ab303b72c
Merge topic '14186_fix_point_sprite_issues' into next

6020178 BUG #14186: Fix issues with scaling for point sprites.
BUG #14338. Fix build issues with vtkhdf5.

vtkhdf5 is not a linkable target when using external HDF5. One must use the
module API to ensure that the linking works correctly in cases where HDF5 is
external or internal.

Change-Id: I60223a0c69a4f4748c0f7db392a11be58ec2a1f4
BUG #14339: Fix elevation filter panel.

Hide properties that are controlled by 3D widgets explicitly.

Change-Id: I17f7f2f1f221d26ac2ad798c751ff660f5710b66
Merge topic '14339_fix_elevation_filter' into next

8ac3a2f BUG #14339: Fix elevation filter panel.
BUG #14263: Fix pvpython in installed ParaView.

Fixes the issue commit 8bd0620b attempted to fix. We need to add the location of
*Python.so files to sys.path since they are no longer in the same place as the
ParaView shared libraries. Fixed that by correcting the typo in commit
8bd0620b.

Change-Id: Ic5b7618e09a5423d9ae8d89bf0f51e80861883d0
Merge topic '14263_fix_python_in_installs' into next

3413451 BUG #14263: Fix pvpython in installed ParaView.
Merge topic '14338_fix_build_issues' into next

ba2fda5 BUG #14338. Fix build issues with vtkhdf5.
BUG #14343: Fix hang in tile-display mode.

When in data-server/render-server mode with tile-display, ParaView was hanging
when rendering data. This was due to the fact that the data-server never
realized that it was in tile-display mode since the -tdx/tdy parameter is
specified on the render-server and was never communicated to the data-server.
Fixed that issue by adding a communication step between data-server and
render-server during initialization to ensure that they are on the same page as
far as the tile-display mode goes.

Change-Id: If1690293c4087adff5ffa1affd4103a053a1cbde
Merge topic '14343_fix_tile_display_hang' into next

59ad945 BUG #14343: Fix hang in tile-display mode.