Width attribute is not allowed by Custom configuration for ACF but can be set via table context menu

[Irina]

Steps to reproduce:

1. Open datafiltering.html sample
2. Insert a table into the editor2. Allowed attributes: 'table tr th td caption', width is not allowed.
3. Right click and choose 'Cell Properties' from the context menu

Expected:

As width is not allowed by custom configuration, it should not be possible to set it.

Actual:

We can set cell's width and it will be removed when switching between source mode and WYSIWYG view

[Piotrek Koszuliński]

Tabletools are not yet fully integrated with ACF (lacking requiredContent properties for dialogs' inputs). There's already a ticket for this - #10273.

[Irina]

This task should also include context menu, not just dialogs. For example if no style allowed for <td> then 'Cell Properties' should not be displayed or be disabled in the menu list.