[HUE-7423] [dashboard] Introduce gridster.js for layout organization - Cloudera Open Source

Details

Progress

1.	[frontend] Add gridster.js library	Resolved	Enrico Berti
2.	[frontend] Add gridster Knockout binding	Resolved	Enrico Berti
3.	[dashboard] Add configuration flag to enable the new layout	Resolved	Enrico Berti
4.	[dashboard] Auto calculate height of tile based on content	Resolved	Enrico Berti
5.	[dashboard] Allow dragging to dashboard to create a new widget	Resolved	Enrico Berti
6.	[dashboard] Allow removing a Gridster widget	Resolved	Enrico Berti
7.	[dashboard] Initial layout chooser should create the layout in Gridster too	Resolved	Enrico Berti
8.	[dashboard] Add delete functionality to an empty widget	Resolved	Enrico Berti
9.	[dashboard] Add drop functionality to an empty widget	Resolved	Enrico Berti
10.	[dashboard] Recalculate height of non graphical widgets	Resolved	Enrico Berti
11.	[dashboard] Make resize icon more prominent	Resolved	Enrico Berti
12.	[dashboard] Enable drag'n'drop from assist	Resolved	Enrico Berti
13.	[dashboard] Set base size for each widget type to avoid expensive calculations	Resolved	Enrico Berti
14.	[dashboard] Resizing a Gridster widget should resize its content too	Resolved	Enrico Berti