Fixes two issues

Fixes incorrect language targets. Will now find issues with repos that
use that language. Issue: https://github.com/tevko/practice/issues/18
Fixes broken filter on open only issues when languages are selected

Here are some tests I performed to verify (consider adding tests):

Current version:

Selected language = PHP

Detected languages: 

1. https://github.com/aspnet/EntityFramework/issues/636 = C#
2. https://github.com/jackiekircher/jackie_site/issues/2 = CSS/Ruby/JavaScript
3. https://github.com/julianlam/nodebb-plugin-solr/issues/10 = JavaScript/CSS

Selected language = ASP

Detected languages:

1. https://github.com/groue/GRMustache/issues/82 = Obj C/C++
2. https://github.com/bubenkoff/ExpandTabsOnSave-SublimeText/issues/4 = Python
3. https://github.com/syncthing/syncthing/issues/640 = Go/JavaScript

My version w/fix:

Selected language = Scala

Detected languages:

1. https://github.com/sbt/sbt/issues/1564 = Scala
2. https://github.com/gatling/gatling/issues/2161 = Scala
3. https://github.com/akka/akka/issues/15792 =  Scala/Slash/Java

Selected language = Lua

Detected languages:

1. https://github.com/GreatEmerald/libarcomage/issues/21 = Lua/D/C/Shell
2. https://github.com/thinegod/kodotag/issues/8 = Lua/ActionScript
3. https://github.com/PrinterLUA/FORGOTTENSERVER-ORTS/issues/1057 = Lua