refactor(token-dropdown): Minor changes to token-dropdown look on the Client's request

* not showing the dictionary from which the token originates - this info is already included in token's id
  @taipsedog: Do not send "dic" in RESTful API response, also remove it from script format.
* replace scrolled list of lexical forms with wrapped list - TODO @vucalur.
  Committing only provisional work-around: a regular list - one item a line
feat(script-edit-ui), feat(accordions): Accordions for collapsing: sections, sentences and slots

Angular-UI Bootstrap accordion used

Closes #33