VoceVista Video 5.4.1

This is a small service release with some bug fixes:

• File type selector on the “Save As” dialog was invisible in some cases on macOS, which would prevent saving files as Mp3.
• The current colormap was not refreshed when the active colormap was deleted.
• Fix opening files on Windows File Explorer through the right-click context menu “open with VoceVista Video”
• Fix saving edited mp3 files.