DEV: select-kit 2 (#7998)

This new iteration of select-kit focuses on following best principales and disallowing mutations inside select-kit components. A best effort has been made to avoid breaking changes, however if you content was a flat array, eg: ["foo", "bar"] You will need to set valueProperty=null and nameProperty=null on the component.

Also almost every component should have an `onChange` handler now to decide what to do with the updated data. **select-kit will not mutate your data by itself anymore**

app/assets/javascripts/admin/templates/components/admin-report.hbs

@@ -130,7 +130,10 @@
             </span>
 
             <div class="input">
-              {{date-input date=startDate onChange=(action "onChangeStartDate")}}
+              {{date-input
+                date=startDate
+                onChange=(action "onChangeStartDate")
+              }}
             </div>
           </div>
 
@@ -140,7 +143,10 @@
             </span>
 
             <div class="input">
-              {{date-input date=endDate onChange=(action "onChangeEndDate")}}
+              {{date-input
+                date=endDate
+                onChange=(action "onChangeEndDate")
+              }}
             </div>
           </div>
         {{/if}}