mods are currently loaded achievements are disabled

Fixed typo in Aurora & loader update confirmation dialogs.

Buttons for opening a mod's config & changelog files are disabled if the mod hasn't actually been installed yet.

Lists of available mods are now updated after making changes in the Mod Manager window.

Selected executable mod is no longer reset after checking or unchecking 'Enable Poweruser Mods'.

Behavior when creating new save games is a bit more intuitive (the 'new game' button is disabled when it can't be clicked, and the user is presented with a confirmation dialog before creating a fresh DB that tells them the version of Aurora that the new game will target - in later Loader versions, we may allow them to select this manually).

This also means that the dialogs aren't re-shown every time RefreshInstallData() is called.

Got rid of modal dialogs prompting user to update Aurora/the loader on launch (there are a lot of cases where people want to hang back at 1.9.5 and I don't want to annoy them - IMHO the snazzy new update icons are obvious enough).

Additional message after updating Aurora telling user to create a new game in order to use the new version.

Aurora version targeted by the currently loaded game is shown in parenthesis (and only mods compatible with the loaded game's version are shown - but that was already the case).

AuroraLoader now has a changelog as well, and there's a button for accessing it.

mod.json and AuroraLoader now support changelog files (there's a Changelog button next to the Config File button in the mod manager now).

Mods are currently loaded achievements are disabled