Updated the test edit page (still need to do the post page)

models/test.go

@@ -1,6 +1,8 @@
 package models
 
 import (
+  "strconv"
+
   "gorm.io/gorm"
 )
 
@@ -19,3 +21,12 @@ type Test struct {
   // has many results
   Results       []Result
 }
+
+func (t *Test) SelectedBenchmarks() []string {
+  benchmarks := t.Benchmarks
+  ids := make([]string, len(benchmarks))
+  for i, b := range benchmarks {
+    ids[i] = strconv.Itoa(int(b.ID))
+  }
+  return ids
+}