Support multiple participants as filters in dashboard (#5772)

Similar to #5443

Author: aaronherman

src/dispatch/static/dispatch/src/dashboard/case/CaseDialogFilter.vue

@@ -153,9 +153,6 @@ export default {
   methods: {
     applyFilters() {
       if (this.local_participant) {
-        if (Array.isArray(this.local_participant)) {
-          this.local_participant = this.local_participant[0]
-        }
         if (this.local_participant_is_assignee) {
           this.filters.assignee = this.local_participant
           this.filters.participant = null

src/dispatch/static/dispatch/src/dashboard/incident/IncidentDialogFilter.vue

@@ -45,19 +45,19 @@
         <v-list-item>
           <v-card class="mx-auto">
             <v-card-title>Incident Participant</v-card-title>
-            <v-card-subtitle>Show only incidents with this participant</v-card-subtitle>
+            <v-card-subtitle>Show only incidents with these participant(s)</v-card-subtitle>
             <participant-select
               class="ml-10 mr-5"
               v-model="local_participant"
               label="Participant"
-              hint="Show only incidents with this participant"
+              hint="Show only incidents with these participant(s)"
               :project="filters.project"
               clearable
             />
             <v-checkbox
               class="ml-10 mr-5"
               v-model="local_participant_is_commander"
-              label="And this participant is the Incident Commander"
+              label="And these participant(s) are the Incident Commander"
               :disabled="local_participant == null"
             />
           </v-card>
@@ -159,9 +159,6 @@ export default {
   methods: {
     applyFilters() {
       if (this.local_participant) {
-        if (Array.isArray(this.local_participant)) {
-          this.local_participant = this.local_participant[0]
-        }
         if (this.local_participant_is_commander) {
           this.filters.commander = this.local_participant
           this.filters.participant = null