Several translation issues

[lottallegra]

Missing Translation:
• Language names should be translated: „Deutsch“ instead of „German“ (this affects the alphabetical order of the list, as some languages change first letter with translation: Spanish  Español)

[josefkreitmayer]

Wikipedia language version issue goes here: susy-mapviewer#5
"Choose language issue goes here: TransforMap/transformap-viewer-translations#3
Advanced filter menu issues got divided into 3 items: #55 , #56 , #57

[josefkreitmayer]

@lottallegra thank you, there is several issues intermingling on various levels. We will sort them out and process each for itself.

[species]

Language names (and the text "Choose Language") the will stay in English. Imagine we translate them and you accidentally switch to a language you cannot even read and want to switch back ;-)