add search/limiting filter for fonts containing specified characters

[GoogleCodeExporter]

Sometimes you need to pick a font for some text that requires umlauts or more 
exotic characters.

There is no way to limit the selection of fonts to only those that contain all 
characters needed to render the text.

Feature should be available using "Advanced Search" and if possible also using 
a toggle when using the "custom text" as a shorthcut avoiding to search first, 
create a (temporary) collection with matching fonts and limiting the scope to 
the collection

Original issue reported on code.google.com by [email protected] on 2 Jul 2012 at 12:26

[GoogleCodeExporter]

Original comment by JerryCasiano on 27 Apr 2014 at 8:47

• Changed state: Accepted
• Added labels: Milestone-Release1.0, Priority-Low, Type-Enhancement
• Removed labels: Priority-Medium, Type-Defect