Updating ParaView icons.

Updating ParaView icons to a newer version -- flat shading.

Change-Id: I4ba122f7899e9dad6fa99f5a70964133c9dc45ee
Based on popular demand, splash screens are back by default.

Change-Id: Idc19300fcb019dfa7a0a543afea4869dc9eb2bf8
Minor edits to About dialog formatting and layout.

Change-Id: I7c8471a65c0ac95a35e764de355673124f23f28a
Update the splash screen images.

Change-Id: I2a7b5503371e66295551e12729aad9796d3f86e1
Merge topic 'update_paraview_icons'

bb2e9213 Update the splash screen images.
7b05e8eb Minor edits to About dialog formatting and layout.
9d5f2a26 Based on popular demand, splash screens are back by default.
21e0e226 Updating ParaView icons.