treewide: use dot shorthands where possible

Now this feature is stable, we should use it. I might have missed some usecases, but these can be added in future commits.

lib/helpers/extensions/gomuks_buffer.dart

@@ -7,8 +7,8 @@ import "package:nexus/src/third_party/gomuks.g.dart";
 extension GomuksOwnedBufferToX on GomuksOwnedBuffer {
   Uint8List toBytes() {
     try {
-      if (base == nullptr || length <= 0) return Uint8List(0);
-      return Uint8List.fromList(base.asTypedList(length));
+      if (base == nullptr || length <= 0) return .new(0);
+      return .fromList(base.asTypedList(length));
     } finally {
       calloc.free(base);
     }

lib/helpers/extensions/mxc_to_https.dart

@@ -1,5 +1,4 @@
 extension MxcToHttps on Uri {
-  Uri mxcToHttps(String homeserver) => Uri.parse(
-    homeserver,
-  ).resolve("_matrix/client/v1/media/download/$host$path");
+  Uri mxcToHttps(String homeserver) =>
+      .parse(homeserver).resolve("_matrix/client/v1/media/download/$host$path");
 }

lib/helpers/extensions/scheme_to_theme.dart

@@ -1,16 +1,16 @@
 import "package:flutter/material.dart";
 
 extension SchemeToTheme on ColorScheme {
-  ThemeData get theme => ThemeData.from(colorScheme: this).copyWith(
-    cardTheme: CardThemeData(color: primaryContainer),
+  ThemeData get theme => .from(colorScheme: this).copyWith(
+    cardTheme: .new(color: primaryContainer),
+    popupMenuTheme: .new(
+      shape: RoundedRectangleBorder(borderRadius: .circular(16)),
+      color: surfaceContainerHigh,
+    ),
     appBarTheme: AppBarTheme(
       titleSpacing: 0,
       backgroundColor: surfaceContainerLow,
     ),
-    popupMenuTheme: PopupMenuThemeData(
-      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
-      color: surfaceContainerHigh,
-    ),
     textTheme: ThemeData(
       fontFamilyFallback: ["sans", "emoji"],
       brightness: brightness,

lib/helpers/extensions/show_context_menu.dart

@@ -9,8 +9,8 @@ extension ShowContextMenu on BuildContext {
 
     showMenu(
       context: this,
-      constraints: BoxConstraints.loose(Size.infinite),
-      position: RelativeRect.fromLTRB(
+      constraints: .loose(Size.infinite),
+      position: .fromLTRB(
         globalPosition.dx,
         globalPosition.dy,
         overlay.size.width - globalPosition.dx,

lib/helpers/extensions/show_user_popover.dart

@@ -14,9 +14,9 @@ extension ShowUserPopover on BuildContext {
     children: [
       PopupMenuItem(
         enabled: false,
-        padding: EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+        padding: .symmetric(horizontal: 16, vertical: 8),
         child: IconTheme(
-          data: IconThemeData(),
+          data: .new(),
           child: UserPopover(member, userId, roomId: roomId),
         ),
       ),

lib/helpers/extensions/size_to_string.dart

@@ -2,14 +2,7 @@ import "package:fast_immutable_collections/fast_immutable_collections.dart";
 
 extension SizeToString on int {
   String get sizeAsString {
-    const IListConst<String> suffixes = IListConst([
-      "B",
-      "KB",
-      "MB",
-      "GB",
-      "TB",
-      "PB",
-    ]);
+    const suffixes = IListConst(["B", "KB", "MB", "GB", "TB", "PB"]);
 
     var i = 0;
     var size = toDouble();

lib/helpers/launch_helper.dart

@@ -10,9 +10,7 @@ class LaunchHelper {
     try {
       return await ul.launchUrl(
         url,
-        mode: useWebview
-            ? ul.LaunchMode.inAppBrowserView
-            : ul.LaunchMode.externalApplication,
+        mode: useWebview ? .inAppBrowserView : .externalApplication,
       );
     } on PlatformException catch (_) {
       return false;