Insert any template content start with html table result in empty paragraph

[Garry Yao]

Reproducing Procedures

1. Open 'replacebyclass' sample pages, open 'Templates' dialog.
2. Make sure 'Replace actual contents' is checked and click on 'Strange Template' to insert it.

[Frederico Caldeira Knabben]

Regression introduced with [4539].

[Garry Yao]

That's the right fix, while two improvement could be considered:

1. We could safely remove the short circuit at L1615, just be greedy to until meet the deepest editable element;
2. White-spaces will break things.

Ticket Test added at :
​http://ckeditor.t/tt/4781/1.html.

[Frederico Caldeira Knabben]

I've refacted the moveToElementEditStart function, making it bulletproof.

[Frederico Caldeira Knabben]

Fixed yet another small issue in the walker with the new patch.

[Frederico Caldeira Knabben]

Tests updated for the latest patch:
​http://ckeditor.t/tt/4781/1.html.

[Frederico Caldeira Knabben]

Tests updated for the latest patch:
​http://ckeditor.t/tt/4781/1.html

[Garry Yao]

The patch works well for me except for the following issues:

1. Changes in the walker are not used.
2. Please cache the evaluator out of the function scope.

[Frederico Caldeira Knabben]

Fixed with #4734.