Refactor GridRow to use RWTQueryl wrapped elements

Change-Id: I636dc954976beabb142b3e4537b5ee0e2d1f133c
Make "seeable" available on GridRow by using renderConfig, not DOM

Change-Id: I01c0ef1be8af1ec4de980b760a25f65a2ca2f176
Place gridlines directly into GridRowContainer again

The element on top did not let mouse events through to the rows

Change-Id: I29653e052cb8711cc55dfedceab1b0f5523690a5
Fix grid row overlay layouting

Change-Id: I78b0a7654859342554bdbb9e6f8e016b4e12ffa7