Fix click event bubbling in Table::onRowClick()

[ibelar]

fix #1601

[mvorisek]

If I understand the issue, we need to prevent event bublibling from controls in table cells. This does not solve it, at least not automatically. Then I belive we do not even need the option to pass any selector to exlude (and for rare cases, the user can do it on it's own as the method is simple).

[mkrecek234]

A thought to get this finalised: Shouldn't we add a class to all links, checkboxes or other clickable items that are added to a table row, just like you did it for Checkbox::CHECKBOX_COLUMN_CSS like atk4-table-column-clickable. This class we set automatically for classes in Atk4\Ui\Table\Column like you did for Checkboxes, but also for Link. We can then define function onRowClick($action, array $excludeSelector = ['atk4-table-column-clickable]). So developers have all flexibility.

Whatever you guys consider best to get this released ;-) Please comment and I can adjust the code.

[mkrecek234]

We should do a generalisation by a defined class, here atk4-norowclick.
The selector td:not(atk4-norowclick) does not work, it does not prevent the action be triggered as you can see in the grid.php demo.

[mkrecek234]

Fixed, working now as specified - please check demo and revert demo changes in grid.php before merge

[mvorisek]

@mkrecek234 PR looks very well made!

I just need to write the test.

Also, the coverage has decreased hugely. I am already on it. The problem is present since #1840. It seems there is some bug with https://github.com/sebastianbergmann/php-code-coverage itself when caching is enabled.

[mvorisek]

Thank you @ibelar and @mkrecek234!