Made added draggable elements persist between pages.

src/main/resources/templates/sign.html

@@ -235,15 +235,15 @@
                             <style>
                                 #box-drag-container {
                                     position: relative;
+                                    margin: 20px 0;
                                 }
                                 #pdf-canvas {
                                     box-shadow: 0px 0px 8px rgba(0, 0, 0, 0.384);
-                                    margin: 20px 0;
                                     width: 100%;
                                 }
                                 .draggable-buttons-box {
                                     position: absolute;
-                                    top: 20px;
+                                    top: 0;
                                     padding: 10px;
                                     width: 100%;
                                     display: flex;