Top save button + fixed some CSS

src/webui/theme-editor/index.html

@@ -10,6 +10,7 @@
       <strong>Current theme:</strong> <span id="current-theme"></span>
     </div>
     <form id="theme-editor-form">
+      <button type="submit" class="top-save">Save</button>
       <!-- Colors Section -->
       <fieldset id="color-picker">
         <h2>Colors</h2>
@@ -133,8 +134,9 @@
           </div>
         </div>
       </fieldset>
-      <button type="submit">Save Theme</button>
+      <button type="submit">Save</button>
     </form>
+    <!-- Stepper -->
     <div class="section">
       <h2>Steps</h2>
       <p> Follow the steps to generate your static gallery</p>