fix: comment large query in scheduler.py
feat: include scheduler button link in index page jumbotron
feat: include missing table headers in scheduler table
fix: remove add and edit assign employees button
feat: add employee filter
feat: include scheduler script
fix: style: change background color of ms from gray to white to make it similar to chosen
feat: add scheduler script; apply ms to employee filter
feat: include chosen script and css file in schedule.html
feat: apply chosen on employee input filter
feat: placeholder for employeeFilter
feat: temporary dummy options in employee filter
feat: add chosen css and script files
fix: style: include 'down arrow' image for chosen
fix: apply chosen instead of ms for intervalInput
feat: include chosen script and css
feat: include placeholder for interval Input
fix: dummy option to enable placeholder
feat: apply chosen for serviceStateInput filter
fix: adjust placeholder text height to center