fix: custom emote placeholder

- place emote loading spinner in the position as the emote itself
- add key to preview in order to ensure proper states aligned

Signed-off-by: TheOneWithTheBraid <the-one@with-the-braid.cf>

lib/pages/chat/input_bar.dart

@@ -263,6 +263,8 @@ class InputBar extends StatelessWidget {
           crossAxisAlignment: CrossAxisAlignment.center,
           children: <Widget>[
             MxcImage(
+              // ensure proper ordering ...
+              key: ValueKey(suggestion['name']),
               uri: suggestion['mxc'] is String
                   ? Uri.parse(suggestion['mxc'] ?? '')
                   : null,

lib/pages/settings_emotes/settings_emotes_view.dart

@@ -212,16 +212,20 @@ class EmotesSettingsView extends StatelessWidget {
 
 class _EmoteImage extends StatelessWidget {
   final Uri mxc;
+
   const _EmoteImage(this.mxc);
 
   @override
   Widget build(BuildContext context) {
     const size = 38.0;
-    return MxcImage(
+    return SizedBox.square(
+      dimension: size,
+      child: MxcImage(
         uri: mxc,
         fit: BoxFit.contain,
         width: size,
         height: size,
+      ),
     );
   }
 }