Credits of the flat & flled icons:

* https://www.flaticon.com/packs/text-editor-36
* https://www.flaticon.com/packs/basic-ui-5
* https://www.flaticon.com/packs/arrows-45/2
* https://www.flaticon.com/packs/folders-32 (flat)
* https://www.flaticon.com/packs/folders-20 (filled)
* https://www.flaticon.com/packs/network-31 (flat)
* https://www.flaticon.com/packs/network-22 (filled)
* https://www.flaticon.com/packs/basic-ui-28 (similar to basic-ui-5)
* https://www.flaticon.com/packs/alignment-and-paragraph-5

Still wanted (flat & filled icon packs):

    * https://www.flaticon.com/packs/tables-83
    * https://www.flaticon.com/packs/selection-and-cursors-27
    * https://www.flaticon.com/packs/email-6
    * https://www.flaticon.com/packs/image-files-3