Some widgets not sizing properly with wxWidgets 3.2.0

[sjanzou]

For example on macOS 12.5, the PV Uncertainty text boxes withing sizers are not sizing properly:

Resizing windows does not update widget widths when calling sizer layout.

[sjanzou]

Also, applies to filter box on library widget:

[sjanzou]

Fix in wex branch SAM_1112 in pull request 147 NatLabRockies/wex#147