Carry the linked nodes across Monitor jumps and clarify PBS web links

- A jump between Monitors carries the Monitors the source links, and the destination offers them in one dialog with a checkbox each
- The offer is not repeated in the same browser session after choosing Not now, and disappears once every node is known
- A Proxmox Backup Server without a Monitor is shown as its web interface, with its own icon
- The linked nodes form follows the edit-mode contrast rule, with a blue Add button
- New texts translated into all languages

AppImage/messages/sk/common.json

@@ -7374,6 +7374,10 @@
     "backTo": "Späť na {name}",
     "cameFromTitle": "Pridať uzol monitora?",
     "cameFromBody": "Pridajte {name} do prepojených uzlov tohto monitora.",
-    "notNow": "Teraz nie"
+    "notNow": "Teraz nie",
+    "knownTitle": "Pridať prepojené uzly?",
+    "knownBody": "{name} prepája tieto monitory. Vyberte tie, ktoré chcete pridať do tohto monitora.",
+    "addSelected": "Pridať vybrané",
+    "pbsWebInterface": "Webové rozhranie PBS"
   }
 }