[WIP] bootstrap5 + icons #183

Job	Run time
Validate coverage	22s
Functional Python 3 web tests	49s
Lint the package	26s
Build the documentation	34s
Python: 3.7-x64 on ubuntu-latest	20s
Python: 3.7-x64 on windows-latest	1m 19s
Python: 3.7-x86 on windows-latest	1m 6s
Python: 3.7-x64 on macos-latest	26s
Python: 3.8-x64 on ubuntu-latest	20s
Python: 3.8-x64 on windows-latest	1m 16s
Python: 3.8-x86 on windows-latest	1m 55s
Python: 3.8-x64 on macos-latest	41s
Python: 3.9-x64 on ubuntu-latest	21s
Python: 3.9-x64 on windows-latest	1m 14s
Python: 3.9-x86 on windows-latest	2m 18s
Python: 3.9-x64 on macos-latest	31s
Python: 3.10-x64 on ubuntu-latest	20s
Python: 3.10-x64 on windows-latest	1m 20s
Python: 3.10-x86 on windows-latest	1m 51s
Python: 3.10-x64 on macos-latest	30s
Python: 3.11-x64 on ubuntu-latest	20s
Python: 3.11-x64 on windows-latest	55s
Python: 3.11-x86 on windows-latest	2m 0s
Python: 3.11-x64 on macos-latest	27s
Python: pypy-3.8-x64 on ubuntu-latest	54s
Python: pypy-3.8-x64 on windows-latest	1m 37s
Python: pypy-3.8-x86 on windows-latest	1m 50s
Python: pypy-3.8-x64 on macos-latest	42s
Python: pypy-3.7- on ubuntu-latest	48s
	27m 32s

Provide feedback