Show running tasks in app list

addresses #263

![img](https://d2oawfjgoy88bd.cloudfront.net/533da756c38aa51217f640dd/533da777c38aa51219a9875c/536d1c4bc38aa5394a4d0abf.png?Expires=1399746001&Signature=OPL00DtkHOoyKNoM4j-7fUmPMRmeBPBcslnUVSRuwk8TUshQ4CAQtn7Nwvpt9r~tpeJh7cQw7TF0sc1rgo~ZYHI7HNz6l1fdK~V9W9lN-r3EEGebMldZue7haRVPvQkUX2sVO~LKxT-iOdlCjVqRQ~rGdDF6hUw5RDOkat5qzfR8PEkDd1OtEb8O8rL0nBbZImrpy80INS-0yEOOz3uqcx5ttxXXvTYuDxx8NLaOSuBJ0K1zOSnI8g1Ioz2Ca63m3RFaTNtS8c-UAhVaYXviD8c3E2aF0c5eOHCCZW6~mZcfOF~qG2yeocl-8KlNTdv6B8-TpEUcRlQZOkpNtTk7Nw__&Key-Pair-Id=APKAJHEJJBIZWFB73RSA)