Made Edit Post Modal autocomplete always attach to the bottom of the textarea (#4956)

webapp/sass/components/_modal.scss

@@ -24,10 +24,6 @@
             min-height: 8em;
         }
 
-        .suggestion-list {
-            bottom: -149px;
-        }
-
         .suggestion-list__content {
             max-height: 150px;
         }
@@ -669,3 +665,9 @@
         padding-left: 0;
     }
 }
+
+.channel-switch-modal {
+    .modal-body {
+        overflow: visible;
+    }
+}

webapp/sass/components/_suggestion-list.scss

@@ -11,6 +11,11 @@
     bottom: 100%;
 }
 
+.suggestion-list--bottom {
+    position: relative;
+    height: 0;
+}
+
 .suggestion-list__content {
     background-color: $white;
     border: $border-gray;