drop down into nav bar on Rapid Router to introduce translator continued

[lauracumming]

Task Description

Add a drop down into the nav bar in Rapid Router in order to add the option to translate the blocks.

Acceptance Criteria

• [x] drop down added to Nav bar
• [x] set the user's preferred language as the default language

Analytics Requirements

• [x] Create tag in tag manager to track clicks

Something like this would be great: https://www.figma.com/file/6802Amjc4GKRdqzm26ozaw/While-Loop-levels?type=design&node-id=114%3A638&mode=design&t=S49ZCz1J60y1ePHG-1

[lauracumming]

• [x] production approved

Adding tasks for 'do'

[lauracumming]

• [x] Check Cookie banner: banner loads, categories in the right order, cookies disabled by default
• [x] Check Rapid Router: game loads, can solve a level, can save a workspace, can create a level, can save a level, scores get saved, scoreboard loads
• [x] Check OS on browserstack

[SKairinos]

@faucomte97, is this block correct?

[faucomte97]

yes

[evemartin]

new PR just for adding do: https://github.com/ocadotechnology/rapid-router/pull/1623

[lauracumming]

• [x] staging approved

[lauracumming]

checker 2 needed

[faucomte97]

Staging looks good to me.

[lauracumming]

Prod - LGTM

[faucomte97]

LGTM