[WIP] bootstrap5 + icons #182

Job	Run time
Validate coverage	38s
Build the documentation	24s
Functional Python 3 web tests	58s
Lint the package	19s
Python: 3.7-x64 on ubuntu-latest	19s
Python: 3.7-x64 on windows-latest	1m 6s
Python: 3.7-x86 on windows-latest	1m 42s
Python: 3.7-x64 on macos-latest	37s
Python: 3.8-x64 on ubuntu-latest	21s
Python: 3.8-x64 on windows-latest	1m 18s
Python: 3.8-x86 on windows-latest	2m 41s
Python: 3.8-x64 on macos-latest	34s
Python: 3.9-x64 on ubuntu-latest	19s
Python: 3.9-x64 on windows-latest	1m 18s
Python: 3.9-x86 on windows-latest	2m 25s
Python: 3.9-x64 on macos-latest	27s
Python: 3.10-x64 on ubuntu-latest	25s
Python: 3.10-x64 on windows-latest	1m 0s
Python: 3.10-x86 on windows-latest	1m 50s
Python: 3.10-x64 on macos-latest	26s
Python: 3.11-x64 on ubuntu-latest	21s
Python: 3.11-x64 on windows-latest	43s
Python: 3.11-x86 on windows-latest	1m 57s
Python: 3.11-x64 on macos-latest	33s
Python: pypy-3.8-x64 on ubuntu-latest	1m 7s
Python: pypy-3.8-x64 on windows-latest	2m 29s
Python: pypy-3.8-x86 on windows-latest	2m 18s
Python: pypy-3.8-x64 on macos-latest	49s
Python: pypy-3.7- on ubuntu-latest	46s
	30m 10s

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