Changes tab initialization to happen after the configuration is loaded,
which means that it no longer happens as member initializers in the
ConfigurePerGame constructor. Removes the cluster of
??_tab->SetConfiguration's that I added earlier to get around this issue
initially.
Fixes a regression in #6774
GLSL shaders currently do not render correctly on the recent NVIDIA
drivers. This adds a check that forces assembly shaders for these
drivers since they seem unaffected and adds a warning informing of the
decision.
Developers can disable the check by enabling graphics debugging.