Use iconify for Material Icons instead of icon font

added part::frontend type::bug workflow::confirmed labels

assigned to @ZugBahnHof

created branch 213-use-iconify-for-material-icons-instead-of-icon-font to address this issue

mentioned in merge request !291 (closed)

mentioned in merge request !292 (merged)

closed with merge request !292 (merged)

mentioned in commit 1ea8aeab