* grid: fix small panels migration and make panel height closer to row height * grid: migrate rows * grid: increase min panel height * grid: fix panel placement for complex layouts * dashboard migration: refactor * dashboard migration: add tests for grid layout * dashboard: fix complex layout migration * dashboard migration fix: fill current row if it possible * test: fix karma tests by setting default panel span * dashboard: fix migration when panel height more than row height * dashboard: fix migration for collapsed rows * grid: add all rows if even one collapsed or titled row is present