Simplify chart UI

[mark-prins]

Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] Might look nicer like this:

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Additional context Trello: https://trello.com/c/D6qysY5A/229-move-sensor-name-above-graphs

[AnushaUp]

Tested and Passed in v0.5.6👌