Search and favorites in voices

[hugbug]

Received feature request:

• To make it quicker and easier to find a voice we should implement a dynamic searchfield.
• Input of a known parts of a voice, to get a list of possible voices on the fly.
• Button to empty the searchfield, or a „longtouch“, or doubleclick on the field.
• Mark voices as favorite
• Button to toggle between „favorites“ or „all voices“