Merge branch 'bugfix/use-icon-folder-inside-assets' into 'develop'

Use assets folder inside typo3temp for icons

See merge request !393
5 jobs for develop in 6 minutes and 8 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #11767
test:php

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passed #11768
test:unit

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  Build
passed #11769
build

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  Layout
passed #11770
layout

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  Deploy
passed #11771
deploy-develop

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