FIX: select-box improvments

- more tests for category-select-box
- allows to clear selection
- fix positioning on safari
- focus on click
- do not display uncategorized if not allowed in settings
- fix component state impacting other specs
- better texts
- higher category-select-box on mobile

test/javascripts/acceptance/category-select-box-test.js.es6

@@ -0,0 +1,26 @@
+import { acceptance } from "helpers/qunit-helpers";
+
+acceptance("CategorySelectBox", {
+  loggedIn: true,
+  settings: {
+    allow_uncategorized_topics: false
+  }
+});
+
+QUnit.test("does not display uncategorized if not allowed", assert => {
+  visit("/");
+  click('#create-topic');
+
+  click(".category-select-box .select-box-header");
+  andThen(() => {
+    assert.ok(!exists('.category-select-box .select-box-row[title="uncategorized"]'));
+  });
+});
+
+QUnit.test("prefill category when category_id is set", assert => {
+  visit("/new-topic?category_id=1");
+
+  andThen(() => {
+    assert.equal(find('.category-select-box .current-selection').html().trim(), "bug");
+  });
+});