Prevent move to new topic tag input from becoming too wide on click

app/assets/javascripts/select-kit/components/multi-select.js.es6

@@ -39,7 +39,7 @@ export default SelectKitComponent.extend({
   @on("didRender")
   _setChoicesMaxWidth() {
     const width = this.$body().outerWidth(false);
-    this.$(".choices").css({ maxWidth: width, width });
+    this.$(".choices").css({ maxWidth: width });
   },
 
   @on("didReceiveAttrs")

app/assets/stylesheets/common/select-kit/multi-select.scss

@@ -70,6 +70,7 @@
       display: flex;
       justify-content: flex-start;
       flex-wrap: wrap;
+      width: 100%;
 
       .choice {
         display: inline-flex;

app/assets/stylesheets/desktop/modal.scss

@@ -139,10 +139,11 @@
     }
 
     form {
+      width: 95%;
       margin-top: 20px;
       #split-topic-name,
       #choose-topic-title {
-        width: 520px;
+        width: 100%;
       }
     }
   }