fix(ui5-table): rowClick is fired for popped in cells as well

[vladitasev]

There were 2 separate bugs:

• In TableRow.hbs the event handler for popped in rows was bound inside a loop ({{#each popinCells}}) however without ../ so it was never executed.
• Even after adding ../ the event was firing only when the user specifically clicks on the table cell, not on the whole row. The reason is that _cellclick is fired from ui5-table-cell only and inside popped in rows much of the content is just regular <td>s which don't fire any events. It is not necessary for the table cell to proxy clicks to the table row and the row to proxy clicks to the table. It is enough to just bind @click handlers to the normal <tr> and the popped in <tr> inside TableRow.hbs. In addition, it is not necessary to fire the publick rowClick event from ui5-table. It's better to fire it from ui5-table-row and it will propagate to the table anyway. I don't mind leaving the event's documentation on table level, although technically it's not fired by the table itself.

closes: #1670

[ilhan007]

Nice clean up