Add rotate-symbol and more tooltip text (#8)

src/i18n/de/translation.json

@@ -57,7 +57,7 @@
     "next-page": "Nächste Seite",
     "last-page": "Letzte Seite",
     "page-count": "von {{totalPages}}",
-    "rotate-signature": "Signatur rotieren",
+    "rotate-signature": "Signatur im Uhrzeigersinn rotieren",
     "rotate": "Rotieren",
     "continue": "Platzierung bestätigen"
   },

src/i18n/en/translation.json

@@ -57,7 +57,7 @@
     "next-page": "Next page",
     "last-page": "Last page",
     "page-count": "of {{totalPages}}",
-    "rotate-signature": "Rotate signature",
+    "rotate-signature": "Rotate signature clockwise",
     "rotate": "Rotate",
     "continue": "Confirm placement"
   },

src/vpu-pdf-preview.js

@@ -494,7 +494,7 @@ export class PdfPreview extends ScopedElementsMixin(VPULitElement) {
                             <button class="button ${classMap({hidden: !this.isShowPlacement})}"
                                     title="${i18n.t('pdf-preview.rotate-signature')}"
                                     @click="${() => { this.rotateSignature(); } }"
-                                    ?disabled="${this.isPageRenderingInProgress}">${i18n.t('pdf-preview.rotate')}</button>
+                                    ?disabled="${this.isPageRenderingInProgress}">&#10227; ${i18n.t('pdf-preview.rotate')}</button>
                             <button class="button is-primary ${classMap({hidden: !this.isShowPlacement})}"
                                     @click="${() => { this.sendAcceptEvent(); } }">${i18n.t('pdf-preview.continue')}</button>
                         </div>