[CLOSED] Don't allow creating empty file filters

[core-ai-bot]

Issue by MarcelGerber
Wednesday May 28, 2014 at 23:45 GMT
Originally opened as adobe/brackets#7965

---

For #7961@bchintx@RaymondLim

This also fixes #7960.

---

MarcelGerber included the following code: https://github.com/adobe/brackets/pull/7965/commits