Make some code fixes

Author: Frezyx

lib/src/widgets/bottom_bar_with_sheet_item.dart

@@ -39,48 +39,33 @@ class BottomBarWithSheetItemWidget extends StatelessWidget {
 
   List<Widget> get _items {
     final items = <Widget>[
-      if (theme.isVerticalItemLabel) Spacer(),
+      if (!theme.isVerticalItemLabel) Spacer(),
       Icon(
         model.icon,
         color: isSelected ? theme.selectedItemIconColor : theme.itemIconColor,
         size: isSelected ? theme.selectedItemIconSize : theme.itemIconSize,
       ),
-    ];
-
-    if (model.label != null) {
-      if (theme.isVerticalItemLabel) {
-        items.addAll(
-          [
-            SizedBox(
-              height: 2,
-            ),
-            Text(
+      if (model.label != null)
+        if (theme.isVerticalItemLabel) ...[
+          SizedBox(height: 2),
+          Text(
+            model.label!,
+            style:
+                isSelected ? theme.selectedItemTextStyle : theme.itemTextStyle,
+          ),
+        ] else ...[
+          SizedBox(width: 2),
+          Expanded(
+            flex: 2,
+            child: Text(
               model.label!,
               style: isSelected
                   ? theme.selectedItemTextStyle
                   : theme.itemTextStyle,
             ),
-          ],
-        );
-      } else {
-        items.addAll(
-          [
-            SizedBox(
-              width: 2,
-            ),
-            Expanded(
-              flex: 2,
-              child: Text(
-                model.label!,
-                style: isSelected
-                    ? theme.selectedItemTextStyle
-                    : theme.itemTextStyle,
-              ),
-            ),
-          ],
-        );
-      }
-    }
+          ),
+        ],
+    ];
 
     return items;
   }