[QA] Left menu elements picks browser's language instead of the oC account settings

[davitol]

Tested using oCIS 1.0.0.-RC5

Left menu elements picks browser's language instead of the oC account settings

[jnweiger]

Retested with rc6

System language: German,
Einsteins selected language: French

We see a mixture of one third German, one third English and one third French.

Expected behaviour: Tutes francais!

[exalate-issue-sync]

Benedikt Kulmann commented: Changing the language only updates the left sidebar menu items on the first language switch (they should switch to a different language every time you change the language in settings). Sometimes (tm) there is a duplication of menu items after a language switch.

However, it looks like the left sidebar is the only component affected by this. The issue might be that we use the route path of menu items as their keys in the sidebar component and therefor it doesn't get re-rendered when the label changes: https://github.com/owncloud/owncloud-design-system/blob/4bd20916a903fd802e6d1a2f20c844ca88c279a2/src/components/OcSidebar.vue#L31

The remaining mix of languages is a result of missing translations in transifex.