Node's menu link removed when changing either title, date or author via in-place editing (also: fape.inc is unmaintainable)

Confirmed, and expanded.

Solving this is now blocked on #1947802: Clean up Edit's PHP to make it more maintainable: Drupal 8-style in-place editor definitions.

Instead of this being blocked on #1947802: Clean up Edit's PHP to make it more maintainable: Drupal 8-style in-place editor definitions, I decided that it's better to solve the different parts of that problem in subissues. Hence this is one such subissue.

I'm happy to report that by cleaning up fape.inc, restructuring it, diving deep into Node & Entity APIs and carefully comparing code flow and object dumps, I was able to solve this problem :)

For future reference: most of the issue was cleaning up (fape.inc is now highly consistent instead of highly inconsistent), the key part of the solution to this particular problem happened in _edit_node_object_prepare(). I also managed to get rid of the entity reloading after saving in pages.inc, and fixed a bug in the re-rendering of the node author.

http://drupalcode.org/project/edit.git/commit/7dd2f86

[non-issue posted in incorrect location]