Allow to fold (hide) Editor

[davidzbiral]

For annotative work without statement building, allow to fold (hide) Editor to the right, just as one can fold the right panel with Search, Bookmarks and Templates. This will allow to make Annotator and thus also the text bigger and more convenient, and hide a box irrelevant for users who annotate e.g. Persons and Locations and Concepts, but don't model Statements.

Count on the situation where the Editor will be folded, but the right panel with Search unfolded for the user to see full text search results and jump to them in Annotator (#2159).