fix bugs in drag/drop, move styling for functions to separate sheets

To clean up the multi tool page and make the pdf adapters more re-usable the style for them was moved to separate pages that are inserted into head when the adapter is created.

src/main/resources/static/css/pdfActions.css

@@ -0,0 +1,87 @@
+
+.pdf-actions_button-container {
+    z-index: 2;
+    display:flex;
+    opacity: 0;
+    transition: opacity 0.1s linear;
+}
+
+.pdf-actions_container:hover .pdf-actions_button-container {
+    opacity: 1;
+}
+
+.pdf-actions_button-container > * {
+    padding: 0.25rem 0.5rem;
+    margin: 3px;
+    display: block;
+}
+
+.pdf-actions_container svg {
+    width: 16px;
+    height: 16px;
+}
+.pdf-actions_container:nth-child(1) .pdf-actions_move-left-button {
+    display: none;
+}
+.pdf-actions_container:last-child .pdf-actions_move-right-button {
+    display: none;
+}
+
+/* "insert pdf" buttons that appear on the right when hover */
+.pdf-actions_insert-file-button-container {
+    translate: 0 -50%;
+    width: 80px;
+    height: 100%;
+    
+    z-index: 1;
+    opacity: 0;
+    transition: opacity 0.2s;
+}
+
+.pdf-actions_insert-file-button-container.left {
+    left: -20px;
+}
+
+.pdf-actions_insert-file-button-container.right {
+    right: -20px;
+}
+
+html[lang-direction=ltr] .pdf-actions_insert-file-button-container.right {
+    display:none;
+}
+
+html[lang-direction=rtl] .pdf-actions_insert-file-button-container.left {
+    display:none;
+}
+
+.pdf-actions_insert-file-button-container.left .pdf-actions_insert-file-button {
+    left: 0;
+    translate: 0 -50%;
+}
+
+.pdf-actions_insert-file-button-container.right .pdf-actions_insert-file-button {
+    right: 0;
+    translate: 0 -50%;
+}
+
+html[lang-direction=ltr] .pdf-actions_container:last-child > .pdf-actions_insert-file-button-container.right {
+    display: block;
+}
+
+
+html[lang-direction=rtl] .pdf-actions_container:last-child > .pdf-actions_insert-file-button-container.left {
+    display: block;
+}
+
+.pdf-actions_insert-file-button-container:hover {
+    opacity: 1;
+    transition: opacity 0.05s;
+}
+.pdf-actions_insert-file-button {
+    position: absolute;
+    top: 50%;
+    right: 50%;
+    translate: 50% -50%;
+    aspect-ratio: 1;
+    border-radius: 100px;
+}