soundboard: added a help tooltip about supported input formats
voice changer: output parameters are now saved and loaded per-preset and can be enabled/disabled
voice changer: improved noise filter
voice changer: added shortcuts to select a custom preset, you can find them in the configuration panel or by right-clicking the current selected preset
fixed a bug that allowed creation of push-to-talk shortcuts on unsupported actions
fixed a couple of rare crashes
improved memory management
steam workshop: fixed a couple of issues in the workshop browser
steam workshop: added vote buttons to the steam library
steam workshop: simplified the upload process
