Restructured widget initialization order #7066

Job	Run time
Pre-commit checks / Pre-commit Checks	36s
Check towncrier / Towncrier Checks	30s
Package Toga (cocoa) / Create Python Package	19s
Package Toga (core) / Create Python Package	15s
Package Toga (android) / Create Python Package	24s
Package Toga (demo) / Create Python Package	15s
Package Toga (dummy) / Create Python Package	16s
Package Toga (gtk) / Create Python Package	24s
Package Toga (iOS) / Create Python Package	5m 35s
Package Toga (textual) / Create Python Package	15s
Package Toga (toga) / Create Python Package	24s
Package Toga (web) / Create Python Package	14s
Package Toga (winforms) / Create Python Package	18s
Test core	0s
Testbed	0s
Coverage	0s
	9m 45s

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