Upgrade bootswatch to version 4#1183

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bechir wants to merge 7 commits intosymfony:mainfrom

bechir:upgrade-bootswatch

Commits on Dec 23, 2020

Upgraded to bootswatch 4.5.3
bechir
committed

Commits on Dec 24, 2020

Commits on Dec 30, 2020

Fix typos & remove commented code
bechir
committed

Commits on Feb 5, 2021