Apply button emits accepted() signal

This has the consequence of making certain changes appear in the view
when the Apply button is clicked, which wasn't happening after a
recent change.

Change-Id: Ia24e408fdec33bfa861aa4c23e8c6c51401c7571
A bunch of ParaViewWeb fix

- Fix WebGL export issue (segfault)
- Fix ContourBy array selection in UI
- Add more filter by default
- Prevent proxy.GetProperty('xxx').GetData() when 'xxx' does not exist

Change-Id: I0a73e4ae092a14bb705b6bfc0f30d3c5f233f84d
BUG #14899. Fixed invalid default chart ranges.

When user switched to use "custom axes range", the values would always
simply be 0,1 (unless the user interacted with the view). This fix
ensures that the range properties are updated after each render.

Change-Id: I3514a5a6a019a74525c9f44fc5b64e0b02c7632a
Fix Web Test to validate correct values

Change-Id: I52f3408889520a43bad350ca1881d6142b66a27e
Matplotlib was not working in ParaView binaries.

PARAVIEW_ENABLE_MATPLOTLIB should not depend on whether matplotlib was
found at configure time. This is causing issues with superbuilds and
failing to enable matplotlib components.

Change-Id: I531ce579b1585840b293bdaf41008c7ba890c69e
Add matplotlib tests only if matplotlib is found.

Add matplotlib only if matplotlib is found at configure time.

Change-Id: I35c5fcb904644592d011fec126957c80a5afd023
Ignore Qt warnings

Change-Id: I042dc3f0610109697e8d4bf3c061ec7838b821da
Ignore warnings from genericio/Necktar

Change-Id: Ifaae40f16dfef55ed78154439de0938934fc823a
Merge topic '14899_ensure_good_axes_ranges'

976aeb9f BUG #14899. Fixed invalid default chart ranges.
Merge topic 'fix_matplot_lib'

70c0473a Ignore warnings from genericio/Necktar
7a73f851 Ignore Qt warnings
9234adad Add matplotlib tests only if matplotlib is found.
9327c32a Matplotlib was not working in ParaView binaries.
Merge topic 'fix_proxy_widget_dialog_apply'

ae1f7a9c Apply button emits accepted() signal
Merge topic 'pvweb-fixes'

8b43eb33 Fix Web Test to validate correct values
111e2497 A bunch of ParaViewWeb fix