compose: Name triggers for clearing the topic.

web/src/compose_closed_ui.js

@@ -169,7 +169,7 @@ export function initialize() {
 
     // Click handlers for buttons in the compose box.
     $("body").on("click", ".compose_stream_button", () => {
-        compose_actions.start("stream", {trigger: "new topic button"});
+        compose_actions.start("stream", {trigger: "clear topic button"});
     });
 
     $("body").on("click", ".compose_private_button", () => {

web/src/compose_popovers.js

@@ -43,7 +43,7 @@ export function initialize() {
         onMount(instance) {
             const $popper = $(instance.popper);
             $popper.one("click", ".compose_mobile_stream_button", (e) => {
-                compose_actions.start("stream", {trigger: "new topic button"});
+                compose_actions.start("stream", {trigger: "clear topic button"});
                 e.stopPropagation();
                 instance.hide();
             });

web/src/compose_ui.js

@@ -51,7 +51,7 @@ function get_focus_area(msg_type, opts) {
         (msg_type === "stream" && opts.stream_id) ||
         (msg_type === "private" && opts.private_message_recipient)
     ) {
-        if (opts.trigger === "new topic button") {
+        if (opts.trigger === "clear topic button") {
             return "#stream_message_recipient_topic";
         }
         return "#compose-textarea";

web/tests/compose_actions.test.js

@@ -152,7 +152,7 @@ test("start", ({override, override_rewire, mock_template}) => {
     stream_data.add_sub(denmark);
 
     compose_defaults = {
-        trigger: "new topic button",
+        trigger: "clear topic button",
     };
 
     opts = {};

web/tests/compose_ui.test.js

@@ -886,7 +886,7 @@ run_test("get_focus_area", () => {
         get_focus_area("stream", {
             stream_id: 4,
             topic: "more",
-            trigger: "new topic button",
+            trigger: "clear topic button",
         }),
         "#stream_message_recipient_topic",
     );