Add cell_max_count for grid size
While in 360dp and 320 dpi, having a grid size bigger than 6x6 made the icon text overlap

Change-Id: I76e2c8cdf734c0c936126df8e08f935fe6ce88b3
Add hotseat_max_cell_count
While in 360dp and 320 dpi, using more than 7 ions in dock made them overlap

Change-Id: Ib3a0ec379f659233d8d53532723856db3f19be17