Issue with Configuring Keys in smart_moving_options.txt

Modifying the value of `move.grab.default.key.name` has no effect in-game. I have tried putting in several different keys (my objective being setting it to `C`), but the action remains stuck on `LCONTROL`. Not all options in the file are dysfunctional as I have successfully modified values in the flying section. I would like to note that the other 3 keybindings in this section appear in the game 'Controls...' menu but this one does not, and they do not synchronize the values in smart_moving_options.txt when modified in the game menu. If you could sort out this issue, it would be much appreciated.

Start by tracing how smart_moving_options.txt handles move.grab.default.key.name and how the other three keybindings in that section reach the in-game Controls... menu. Reproduce the issue with a changed key such as C, then compare the file value with the in-game binding. Done means this keybinding responds to the configured value and stays synchronized with the menu.

Written by the indexing model from the issue text.