SP-1768-FE-The-white-are-in-empty-devices-table-should-take-the-whole-table-size-not-just-the-top (#282)

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## Jira Ticket
[SP-1768](https://syncrow.atlassian.net/browse/SP-1768)

## Description

<!--- Describe your changes in detail -->
fix white container take only a small part of the device table

## Type of Change

<!--- Put an `x` in all the boxes that apply: -->

- [ ] ✨ New feature (non-breaking change which adds functionality)
- [x] 🛠️ Bug fix (non-breaking change which fixes an issue)
- [ ] ❌ Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] 🧹 Code refactor
- [ ] ✅ Build configuration change
- [ ] 📝 Documentation
- [ ] 🗑️ Chore 


[SP-1768]:
https://syncrow.atlassian.net/browse/SP-1768?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

lib/pages/common/custom_table.dart

@@ -179,7 +179,10 @@ class _DynamicTableState extends State<DynamicTable> {
     );
   }
 
-  Widget _buildEmptyState() => Column(
+  Widget _buildEmptyState() => Container(
+        height: widget.size.height,
+        color: ColorsManager.whiteColors,
+        child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
             Row(
@@ -203,7 +206,9 @@ class _DynamicTableState extends State<DynamicTable> {
                 ),
               ],
             ),
+            SizedBox(height: widget.size.height * 0.5),
           ],
+        ),
       );
   Widget _buildSelectAllCheckbox() {
     return Container(