While loading overwrite records with the same id.  Should resolve bug #1750.
Re-check unknown record id after loading.
Revert old fix.
Add 'const' to a spell helper function.
Implement ToggleWorld instruction
Fix size_t underflow for journals with 1 page (Fixes #1958)
Potential shader compatibility fix
Fix priority bug in AiSequence::stack (Fixes #1959)
Adjust third person camera height and default distance to match vanilla MW
Don't reset an unbound input action to its default binding if the key/mouse button for that default binding is already used by another action (Fixes #1960)
Apply third person camera distance to the camera node instead of only the camera itself (Fixes #1705)
Adjust border skin for loading bar and message boxes to match vanilla MW
Remove some unneeded bits from collision mask
Don't update physics and animation for actors outside the AI processing distance
Disease check:  Reuse corprus check from spells.hpp.
Disease Check:  Shorten the resistance calculations.
Merge remote-tracking branch 'cc9cii/Bug-No-1750'
More shader compatibility fixes
Remove comment for old MyGUI version
Remove some unused methods from OEngine::Gui::Layout