[IE8] TableResize throws error over scrollbar

[Piotr Jasiun]

1. Open table-resize sample.
2. Add some empty lines so the scrollbar will show.
3. Drag last pillar and move it so the mouse will be over the scrollbar.

Result: Error multiple times in the console:

Object doesn't support this property or method

First bad commit: ​git:4991411.

I wasn't able to reproduce it on IE9, IE11 and Chrome.

[Piotr Jasiun]

It was possible to reproduce this bug also on FF.

The reason was missing events target document when the mouse was outside the editor. We could switch back to using editable instead of document (see first bad commit) but the we would lost benefits of using document (with document D&D works also below the body if body is small).

I decided to check if events target document exist instead and cancel the event if it's not.

Changes in ​t/11823.

[Piotrek Koszuliński]

I force pushed rebased branch with additional commit simplifying and clarifying the target validation.

However, R- because tests fail.

[Piotr Jasiun]

I rebased branch, run tests and tabletools tests were green on IE8, FF and Chrome, but tableresize tests were red. If fixed those tests and pushed both branches.

[Piotrek Koszuliński]

Ups, my fault - of course I meant tableresize tests.

[Piotr Jasiun]

• ​git:c4a1982
• tests:2de1ed7