Trigger for language and distance values

[amyleew]

Language and distance button on toolbar doesn't seem to be "triggering" action. Button should allow user to change language between:

• Germany / English
• metric / imperial

[TheMarex]

@amyleew Where did the language button go? This is kind of important, we have a large non-English speaking community.

[amyleew]

@TheMarex - Had trouble implementing this. Removed for initial launch.

[amyleew]

@TheMarex - Added icons to this PR: #164:

• images/flags.svg
• images/measurements.svg

Let me know if you need anything else for these 💁