Fixed clientpref usage and added natives to get difficulty details
Added Timer_GetWorldRecordForDifficulty and OnTimerWorldRecordCacheLoaded

Store the record time as float in the enum as well.
Reopen the menu when there is nothing to show
Fixed adminmenu entry translations
Only restrict the buttons instead of blocking all player commands
Fix restrictions on ladders and actually restrict movement again
Merge pull request #17 from peace-maker/testing

Expose natives to iterate and set difficulties