Improve search result counts (#2221)

* remove limit from emoji autocomplete

* remove search limit from user mention

* remove limit from room mention autocomplete

* increase user search limit to 1000

* better search string selection for emoticons

src/app/plugins/utils.ts

@@ -0,0 +1,19 @@
+import { SearchItemStrGetter } from '../hooks/useAsyncSearch';
+import { PackImageReader } from './custom-emoji';
+import { IEmoji } from './emoji';
+
+export const getEmoticonSearchStr: SearchItemStrGetter<PackImageReader | IEmoji> = (item) => {
+  const shortcode = `:${item.shortcode}:`;
+  if (item instanceof PackImageReader) {
+    if (item.body) {
+      return [shortcode, item.body];
+    }
+    return shortcode;
+  }
+
+  const names = [shortcode, item.label];
+  if (Array.isArray(item.shortcodes)) {
+    return names.concat(item.shortcodes);
+  }
+  return names;
+};