Fix missing/incorrect propTypes on geppetto-showcase

[Muhaddatha]

After the work done on #246.
We realized a couple of new issues related with the showing of propTypes which require further investigation.

For example, the PlotComponent has the following props:

geppetto-meta/geppetto.js/geppetto-ui/src/plot/PlotComponent.js

Line 380 in ad66936

PlotComponent.propTypes = {

But the prop list looks like this in the showcase:

Fields such as PlotComponent.plots.x and PlotComponent.plots.lineOptions are not displayed in the showcase.

Checklist:

• Add type and description to connectivity viewer > names > name attribute:
• Add type and description to VR canvas > instances > name attribute
• Fix incorrect props for connectivity viewer > layout
• Fix incorrect props for dicom-viewer
• Fix incorrect props for plotcomponent > plots
• Fix incorrect props for list viewer > columnConfiguration

[afonsobspinto]

For the incorrect props, It seems that we are retrieving the props correctly from the code:

So my best guest is that the problem will be in the way we generate the table aka here