DEV: Eliminate "post bounce" after creating a post

Fix has two parts:
a) skips jumping to post if post is in view
b) debounces layout calculation when composer changes state

app/assets/javascripts/discourse/components/composer-body.js.es6

@@ -1,8 +1,11 @@
-import { throttle } from "@ember/runloop";
-import { run } from "@ember/runloop";
-import { cancel } from "@ember/runloop";
-import { scheduleOnce } from "@ember/runloop";
-import { later } from "@ember/runloop";
+import {
+  run,
+  cancel,
+  scheduleOnce,
+  later,
+  debounce,
+  throttle
+} from "@ember/runloop";
 import Component from "@ember/component";
 import discourseComputed, { observes } from "discourse-common/utils/decorators";
 import Composer from "discourse/models/composer";
@@ -67,11 +70,15 @@ export default Component.extend(KeyEnterEscape, {
         return;
       }
 
-      const h = $("#reply-control:not(.saving)").height() || 0;
-      this.movePanels(h);
+      debounce(this, this.debounceMove, 300);
     });
   },
 
+  debounceMove() {
+    const h = $("#reply-control:not(.saving)").height() || 0;
+    this.movePanels(h);
+  },
+
   keyUp() {
     this.typed();
 

app/assets/javascripts/discourse/controllers/composer.js.es6

@@ -734,7 +734,7 @@ export default Controller.extend({
 
         const post = result.target;
         if (post && !staged) {
-          DiscourseURL.routeTo(post.url);
+          DiscourseURL.routeTo(post.url, { skipIfOnScreen: true });
         }
       })
       .catch(error => {