Improve button layout and increase dialog width

src/environments-dialog.ui

@@ -5,7 +5,7 @@
 
   <template class="EnvironmentsDialog" parent="AdwDialog">
     <property name="title">Manage Environments</property>
-    <property name="content-width">900</property>
+    <property name="content-width">1100</property>
     <property name="content-height">600</property>
     <property name="follows-content-size">false</property>
 

src/widgets/variable-data-row.ui

@@ -21,6 +21,8 @@
             <property name="hexpand">True</property>
           </object>
         </child>
+      </object>
+    </child>
 
     <!-- Inline edit buttons (shown only when editing) -->
     <child>
@@ -77,8 +79,6 @@
         </style>
       </object>
     </child>
-      </object>
-    </child>
 
     <child>
       <object class="GtkBox" id="values_box">