Use JS template strings in weekselect.js

Blocks Alsijil !73 (merged) AlekSIS-App-Alsijil!73 (merged)

created merge request !72 (merged) to address this issue

mentioned in merge request !72 (merged)

changed title from Change weekselect.js to js template strings to Use JS template strings in weekselect.js

added part::backend type::refactoring labels

closed via merge request !72 (merged)

mentioned in commit 50fd338d