Use AD tower diameter for VTK visualization + minor improvements #2424

Job	Run time
build-drivers-release	4m 32s
build-all-debug	5m 14s
build-postlib-release	8m 4s
build-all-debug-single	2m 55s
build-test-uadriver-debug	1m 55s
rtest-module-drivers	3m 3s
rtest-modules-debug	5m 22s
build-interfaces-release	3m 14s
build-fastfarm-release	9m 29s
build-openfast-release	3m 37s
rtest-interfaces	6m 52s
rtest-OF-5MW_OC4Semi_WSt_WavesWN	1m 22s
rtest-OF-5MW_Land_AeroMap	2m 20s
rtest-OF-5MW_OC3Mnpl_DLL_WTurb_WavesIrr	1m 42s
rtest-OF-5MW_OC3Trpd_DLL_WSt_WavesReg	5m 3s
rtest-OF-5MW_Land_BD_DLL_WTurb	2m 7s
rtest-OF	7m 2s
rtest-OF-5MW_OC4Jckt_DLL_WTurb_WavesIrr_MGrowth	1m 4s
rtest-OF-linearization	2m 53s
rtest-OF-simulink	9m 32s
rtest-FF	1m 49s
	1h 29m 11s

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