client: fixed Unexpected side effect in computed property Sort mutates the array and since this array lives in the store, this would be considered a bad practice including said side effects. Slice clones the array and we need to slice the array anyway. So simply switching slice and sort solved the problem.

teichmann@intevation.de = sascha.teichmann@intevation.de
bernhard.reiter@intevation.de = bernhard@intevation.de