Refactor pages

[palagdan]

Resolve #84

[blcham]

LGTM, don't care about point 1), but I would like to resolve point 2):

1. I do not have a clear opinion if Page.jsx suffix was necessary, but I do not have problem with it on the other hand. I see that for Modal we have this convention (i.e. Modal.jsx suffix), so ok.
2. I do not understand what is DagrePage and why it is in dagre directory. Dagre to me is the library that visualizes part of the screen, so I do not see a reason why to call it according to this technical aspect of the tool? (I understand it was not your idea) Moreover, I believe only part of the page is related to Dagre right? The page visualizes concrete script right?... If so I suggest using domain-specific name instead. How about calling it ScriptPage.jsx.

[palagdan]

@blcham

To me, ScriptPage.jsx is better because it is more intuitive than Dagre. In future issues, we should refactor this component into separate ones, as the current 730-line component is very hard to understand...

[blcham]

LGTM

You are most-likely right but not sure where you got the convention Vocabulary.js --> vocabulary.js ...