fixed dropdown issue and back button in popup

frontend/angular/src/app/components/admin-portal/edit-message-template/edit-message-template.component.html

@@ -3,7 +3,7 @@
     <form #form="ngForm">
         <div class="ui-g ui-fluid">
             <div class="page-title mb-0">
-                <a [routerLink]="['/admin/list-message-templates']" class="arrow-btn-blue ml-0">
+                <a [routerLink]="['/admin/list-message-templates']" class="arrow-btn-blue ml-0" *ngIf="!objectID">
                     <img src="assets/images/arrow-left-prev_blue.svg">
                 </a>
                 {{editMode ? "Edit" : "Add"}} Message Template

frontend/angular/src/assets/css/custom.scss

@@ -187,11 +187,11 @@
 .dropdown-text {
     width: 75% !important;
 }
-
+.select2-container--open {
+    z-index: 100000;
+}
 .normalDropDown {
-    .select2-container--open {
-        z-index: 100000;
-    }
+
 
     .select2-container {