The option effectively disables per frame mouse checks.
The motivation to add it was that many wireless mice 10-15 years ago had update rates of less than 35Hz, and on these it was necessary to sync mouse input with the playsim to properly interpolate between updates.
Today this is totally useless and even counterproductive because modern mice have significantly higher update rates, so this option no longer smoothes things but instead makes the mouse feel more choppy.
* moved the sprite renaming out of the file system entirely into a caller-provided callback.
* renamed several functions to closer match the terms of a file system.
* moved the VM interface out of the implementation.
The old method using a single string with a backslash as separator is unable to handle anything with actual backslashes in the data.
It now uses a JSON object with each CVAR being a separate key.
- added Marisa Kirisame's CHAN_OVERLAP flag.
- exported S_IsActorPlayingSomething to ZScript.
The sound API change required deprecating A_PlaySound and S_Sound. There are now new variants S_StartSound and A_StartSound which have two distinct parameters for channel and flags.
If this is done within the intermission code, both intermission and menu will write to the same global variables and destroy their data, this became very apparent when it altered the screen scale for the conversation.
The most important one is the autosave tagging. This was done because the old printout was missing the year and printed the month as a 3 character English string, sabotaging any attempt to sort the autosaves by anything meaningful.
* re-added screen blends for images from the hardware renderer.
* moved all postprocessing of the image out of the renderers.
* cleaned out a large piece of cruft for handling the palette in the frame buffer class. This was all a remnant of the old paletted backend that no longer exists. Nowadays the screen blend is just a postprocessing effect drawn over the 3D screen, there is no need to maintain any of it as global state anymore.
* since the engine doesn't produce paletted screenshots anymore there is no need to have handling for it in the generation code. This depended on otherwise obsolete information so it got removed along with that information.
For the Doom IWADs the provided font looks almost identical to the characters used on the title patches. So, for any level name that got replaced in some language, it will now check if the retrieved name comes from the default table, and if not, ignore the title patch and print the name with the specified font.
This also required removing the 'en' label from the default table, because with this present, the text would always be picked from 'en' instead of 'default'. Since 'en' and 'default' had the same contents, in any English locale the 'default' table was never hit, so this won't make any difference for the texts being chosen.
Last but not least, wminfo has been made a local variable in G_DoCompleted. There were two places where this was accessed from outside the summary screen or its setup code, and both were incorrect.
Having everything lumped together made this a maintenance hassle because it affected how the level has to be stored.
This hasn't been tested yet, so it may not work as intended!
