Frontend issues

[danr]

Moving some small issues to this one.

Todo:

• [x] Link color in markdown content in the Main component
• [x] Add reference to markdown
• [ ] GroupForm: bring back stitch (was #65)
• [x] Manual check for issues in different browsers
  • [ ] Textarea edit in admin interface did not work when Artur tried (was #102)
• [x] Fix axis label position here:
• [ ] Overflow-y on boxpylots have no effect here since fom&plot overflows parent:

Maybe:

• [ ] Tests for KMPlotWithControls, in particular the next function (was #75)
• [x] Polyfills for IE 11: flat and flatMap, https://github.com/es-shims/Array.prototype.flatMap (was #74)
• [ ] KMPlot: Use Tooltip? The KMPlot has the tooltip off. Do we want to show any contents in it? (was #66)

Done:

• [x] Explicit px in css (was #93)
• [x] Layout messed up here. Problem with upgrading material-ui?
• [x] Legend broken. Problem with vega-lite being upgraded?

[danr]

• [x] Middle section should grow to make full height here

[danr]

• [x] Add some error message on <script nomodule>...

[danr]

Closing because all critical points are addressed