Keen Modding Live - Studio settings

Previously I wrote some code for Abiathar Live Studio that detects the DOSBox installation and, if it can't find the EXE automatically, asks the user to specify it in Settings. Until today, there was actually no way to use a custom DOSBox path because the Settings item did nothing. Now, there's a little dialog that allows the user to change the DOSBox installation used or the temporary directory.