[WIP] bootstrap5 + icons #188

Job	Run time
Functional Python 3 web tests	1m 54s
Validate coverage	21s
Build the documentation	42s
Lint the package	28s
Python: 3.8-x64 on ubuntu-latest	21s
Python: 3.8-x64 on windows-latest	1m 14s
Python: 3.8-x86 on windows-latest	1m 58s
Python: 3.8-x64 on macos-latest	30s
Python: 3.9-x64 on ubuntu-latest	20s
Python: 3.9-x64 on windows-latest	1m 22s
Python: 3.9-x86 on windows-latest	1m 51s
Python: 3.9-x64 on macos-latest	32s
Python: 3.10-x64 on ubuntu-latest	30s
Python: 3.10-x64 on windows-latest	1m 11s
Python: 3.10-x86 on windows-latest	1m 52s
Python: 3.10-x64 on macos-latest	56s
Python: 3.11-x64 on ubuntu-latest	24s
Python: 3.11-x64 on windows-latest	1m 5s
Python: 3.11-x86 on windows-latest	2m 3s
Python: 3.11-x64 on macos-latest	49s
Python: 3.12-x64 on ubuntu-latest	27s
Python: 3.12-x64 on windows-latest	1m 10s
Python: 3.12-x86 on windows-latest	2m 4s
Python: 3.12-x64 on macos-latest	46s
Python: pypy-3.10-x64 on ubuntu-latest	1m 27s
Python: pypy-3.10-x64 on windows-latest	2m 13s
Python: pypy-3.10-x86 on windows-latest	2m 0s
Python: pypy-3.10-x64 on macos-latest	1m 0s
Python: pypy-3.7- on ubuntu-latest	50s
	32m 20s

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