Block v13 checks and corrections to sidestake contract validation #1733

Job	Run time
Lint	56s
macOS 11 native [GOAL install] [GUI] [no depends]	12m 28s
ARM [GOAL install] [buster]	3m 56s
Win32	4m 1s
Win64	5m 52s
i386 Linux [GOAL install] [focal]	3m 44s
x86_64 Linux [GOAL install] [GUI] [focal] [no depends]	26m 59s
x86_64 Linux [GOAL install] [GUI] [bionic] [no depends]	21m 4s
macOS 10.14 [GOAL deploy] [GUI] [no tests] [focal]	13m 17s
	1h 32m 17s

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