Add wild card support for live filtering

[Oliver-Loeffler]

There was a request to use wild cards for file name filtering.

Wild cards asked for

• '%' and '*' both indicate any string
• ? should indicate any character or number
• a wild card before and after the filter term basically should map to 'contains'
• a trailing wild card should map to 'startsWith'
• a leading wild card should map to 'endsWith'
• Wild card filtering should be case insensitive

Wild card support shall be implemented guided by tests.

[Oliver-Loeffler]

Filtering using % has not been added as this is a valid file name character. Hence only wildcard usage with * has been implemented. First release version with this functionality is 0.0.9. Closed with 4c5b2f6.