Tweak image view to limit size of the text field

lib/screens/image_viewer_screen.dart

@@ -62,6 +62,7 @@ class ImageViewerScreen extends StatelessWidget {
             crossAxisAlignment: CrossAxisAlignment.start,
             children: [
               Expanded(
+                flex: 9,
                 child: InteractiveViewer(
                   clipBehavior: Clip.none,
                   constrained: true,
@@ -72,13 +73,18 @@ class ImageViewerScreen extends StatelessWidget {
                 ),
               ),
               if (attachment.description.isNotEmpty)
-                Padding(
-                  padding: const EdgeInsets.only(
-                    left: 8.0,
-                    right: 8.0,
-                    bottom: 8.0,
+                Expanded(
+                  flex: 1,
+                  child: Padding(
+                    padding: const EdgeInsets.only(
+                      left: 8.0,
+                      right: 8.0,
+                      bottom: 8.0,
+                    ),
+                    child: SingleChildScrollView(
+                      child: Text(attachment.description),
+                    ),
                   ),
-                  child: Text(attachment.description),
                 ),
             ],
           ),