fix(ui): Make the send button's bottom padding adhere to the pickers

lib/ui/pages/conversation/bottom.dart

@@ -273,15 +273,19 @@ class ConversationBottomRowState extends State<ConversationBottomRow> {
           ),
         ),
 
-        Positioned(
-          right: 8,
-          bottom: 8,
-          child: BlocBuilder<ConversationBloc, ConversationState>(
+        BlocBuilder<ConversationBloc, ConversationState>(
           buildWhen: (prev, next) => prev.sendButtonState != next.sendButtonState ||
             prev.isDragging != next.isDragging ||
-              prev.isLocked != next.isLocked,
+            prev.isLocked != next.isLocked ||
+            prev.emojiPickerVisible != next.emojiPickerVisible ||
+            prev.stickerPickerVisible != next.stickerPickerVisible,
           builder: (context, state) {
-              return Visibility(
+            return Positioned(
+              right: 8,
+              bottom: state.emojiPickerVisible || state.stickerPickerVisible ?
+                258 /* 8 (Regular padding) + 250 (Height of the pickers) */ :
+                8,
+              child: Visibility(
                 visible: !state.isDragging && !state.isLocked,
                 child: LongPressDraggable<int>(
                   data: 1,
@@ -359,10 +363,10 @@ class ConversationBottomRowState extends State<ConversationBottomRow> {
                     ),
                   ),
                 ),
+              ),
             );
           },
         ),
-        ),
 
         Positioned(
           left: 8,