Converts tabs to spaces in TypeScript files

ckeditor5_plugins/icon/src/augmentation.ts

ckeditor5_plugins/icon/src/icon.ts

ckeditor5_plugins/icon/src/iconconfig.ts

ckeditor5_plugins/icon/src/iconediting.ts

ckeditor5_plugins/icon/src/iconpicker.ts

ckeditor5_plugins/icon/src/icontoolbar.ts

ckeditor5_plugins/icon/src/icontypes.ts

ckeditor5_plugins/icon/src/iconutils.ts

ckeditor5_plugins/icon/src/inserticoncommand.ts

ckeditor5_plugins/icon/src/modifyiconcommand.ts

...5_plugins/icon/src/view/drupalajaxprogressthrobberview.ts

ckeditor5_plugins/icon/src/view/hideableview.ts

ckeditor5_plugins/icon/src/view/iconpickerfaicon.ts

ckeditor5_plugins/icon/src/view/iconpickerfooter.ts

ckeditor5_plugins/icon/src/view/iconpickerform.ts

ckeditor5_plugins/icon/src/view/iconpickergrid.ts

ckeditor5_plugins/icon/src/view/iconpickerheader.ts

ckeditor5_plugins/icon/src/view/iconpickeritem.ts

ckeditor5_plugins/icon/src/view/iconpickersearch.ts

ckeditor5_plugins/icon/src/view/iconpickerview.ts