TF-2237 Add loading circular for send button

(cherry picked from commit d9db8f467942f16b70140113e222985b61db047a)

lib/features/composer/presentation/composer_view_web.dart

@@ -435,6 +435,7 @@ class ComposerView extends GetWidget<ComposerController> {
                   radius: ComposerStyle.popupMenuRadius
                 );
               },
+              isSending: controller.isSendEmailLoading.value,
             )),
           ]);
         },

lib/features/composer/presentation/widgets/web/bottom_bar_composer_widget.dart

@@ -19,6 +19,7 @@ class BottomBarComposerWidget extends StatelessWidget {
   final VoidCallback saveToDraftAction;
   final VoidCallback sendMessageAction;
   final OnRequestReadReceiptAction? requestReadReceiptAction;
+  final bool? isSending;
 
   final _imagePaths = Get.find<ImagePaths>();
 
@@ -34,6 +35,7 @@ class BottomBarComposerWidget extends StatelessWidget {
     required this.saveToDraftAction,
     required this.sendMessageAction,
     this.requestReadReceiptAction,
+    this.isSending,
   });
 
   @override
@@ -126,7 +128,7 @@ class BottomBarComposerWidget extends StatelessWidget {
           ),
           const SizedBox(width: BottomBarComposerWidgetStyle.sendButtonSpace),
           TMailButtonWidget(
-            text: AppLocalizations.of(context).send,
+            text: isSending! ? AppLocalizations.of(context).sending : AppLocalizations.of(context).send,
             icon: _imagePaths.icSend,
             iconAlignment: TextDirection.rtl,
             padding: BottomBarComposerWidgetStyle.sendButtonPadding,
@@ -136,6 +138,7 @@ class BottomBarComposerWidget extends StatelessWidget {
             backgroundColor: BottomBarComposerWidgetStyle.sendButtonBackgroundColor,
             borderRadius: BottomBarComposerWidgetStyle.sendButtonRadius,
             onTapActionCallback: sendMessageAction,
+            isLoading: isSending,
           )
         ]
       ),