Text around editor highlights during resize event

[Jakub Ś]

Bug reported by @mrfr0g

We've determined that during the resize event on the editor, the text around the editor is allowed to be selected. In some cases, this would cause large blocks of text to be selected and appear as gray or blue (depending on focus).

1. Configure CKEDITOR to only allow vertical resizing

config.resize_dir = 'vertical';

2. Create an editor with a paragraph of text below it.
3. Resize the editor vertically, then move your mouse horizontally.

The text below the editor should be selected.

Thes can get selected in IE9, Chromw and Safari. This has been reproducible from CKEditor 3.4.3

[Jakub Ś]

@mrfr0g has also provided a patch for the bug.

[Jakub Ś]

#8633 was marked as duplicate.

TC from #8633 :
To reproduce:
Visit creditor.com/demo
Resize to make the editing area larger
Resize to make the editing area smaller but move the mouse pointer above the editor with the mouse button still held down