Phase out transitional CustomInput component

[LordSputnik]

Problem

The CustomInput component was added as part of commit a965f46 during the transition from react-bootstrap 0.29.0 to 0.31.3. It was only ever intended to bridge the gap from the old Input API to the new Form* API, and is an unnecessary level of abstraction acting as a black box in many of our components.

Solution

This PR replaces each use of CustomInput with the equivalent react-bootstrap components (Form.Control, Form.Group, Form.Label, OverlayTrigger and Tooltip).

Areas of Impact

Inputs on the following pages:

/author/:bbid (add to collection modal)
/author/:bbid/delete
/author/:bbid/edit
/author/create
/collection/create
/edition-group/:bbid (add to collection modal)
/edition-group/:bbid/delete
/edition-group/:bbid/edit
/edition-group/create
/edition/:bbid (add to collection modal)
/edition/:bbid/delete
/edition/:bbid/edit
/edition/create
/editor/:id/achievements (drag and drop)
/editor/edit
/merge/submit/:bbid (works and editions)
/publisher/:bbid (add to collection modal)
/publisher/:bbid/delete
/publisher/:bbid/edit
/publisher/create
/register/details
/revision/:id (edit node form)
/search (search field)
/series/:bbid (add to collection modal)
/series/:bbid/delete
/series/:bbid/edit
/series/create
/work/:bbid (add to collection modal)
/work/:bbid/delete
/work/:bbid/edit
/work/create

[MonkeyDo]

Thanks a lot, everything looks great !