"Tables": added refresh method. Fixes #5570 - Dynamically Adding Rows to Reflow Table Results in Unformatted New Rows

@uGoMobi, @Toddparker

table `refresh` method and unit tests.

Examples here:   [table column-toggle](http://www.franckreich.de/members/export/j/toggle.html) and [table reflow-mode](http://www.franckreich.de/members/export/j/reflow.html). 

I hope I did not mix anything up manually copy&pasting between PCs (can't commit from my test environment...)