Real-time collaboration within space (#411)

plug-api/app_event.ts

@@ -9,6 +9,7 @@ export type AppEvent =
   | "editor:init"
   | "editor:pageLoaded"
   | "editor:pageReloaded"
+  | "editor:pageSaved"
   | "editor:modeswitch"
   | "plugs:loaded";
 

plug-api/silverbullet-syscall/editor.ts

@@ -42,8 +42,8 @@ export function reloadPage(): Promise<void> {
   return syscall("editor.reloadPage");
 }
 
-export function openUrl(url: string): Promise<void> {
-  return syscall("editor.openUrl", url);
+export function openUrl(url: string, existingWindow = false): Promise<void> {
+  return syscall("editor.openUrl", url, existingWindow);
 }
 
 // Force the client to download the file in dataUrl with filename as file name