Replace spinner with Progress bar and fix it's position . (#5620) (#5… #14980

Job	Run time
Core Basic (18.x)	7m 2s
Core Blocks (18.x)	8m 13s
Core Basic (20.x)	6m 45s
Core Blocks (20.x)	8m 2s
Core Content (18.x)	3m 51s
Core Control Panels (18.x)	4m 29s
Core Content (20.x)	3m 51s
Core Control Panels (20.x)	4m 48s
Core Basic - Plone 5 (18.x)	6m 39s
Core Blocks - Listing (18.x)	5m 9s
Core Blocks - Listing (20.x)	5m 7s
Coresandbox (18.x)	4m 34s
Core Volto Slate (18.x)	7m 34s
Project Generator (18.x)	7m 8s
Core Volto Slate (20.x)	7m 16s
Project Generator (20.x)	9m 24s
Multilingual (18.x)	3m 38s
Multilingual in Seamless Mode (18.x)	3m 29s
Seamless Mode (18.x)	6m 49s
Working Copy (18.x)	3m 31s
	1h 57m 19s

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