Bug 1790815 - Don't raise the window for tab-modal SubDialogs and in print. r=Gijs

Differential Revision: https://phabricator.services.mozilla.com/D157599

toolkit/components/printing/content/print.js

@@ -355,9 +355,7 @@ var PrintEventHandler = {
     await new Promise(resolve => window.requestAnimationFrame(resolve));
 
     // Now that we're showing the form, select the destination select.
-    window.focus();
-    let fm = Services.focus;
-    fm.setFocus(document.getElementById("printer-picker"), fm.FLAG_SHOWRING);
+    document.getElementById("printer-picker").focus({ focusVisible: true });
 
     await initialPreviewDone;
   },

toolkit/modules/SubDialog.sys.mjs

@@ -879,7 +879,7 @@ SubDialog.prototype = {
     if (!focusedElement) {
       // Ensure the focus is pulled out of the content document even if there's
       // nothing focusable in the dialog.
-      this._frame.contentWindow.focus();
+      this._frame.focus();
     }
   },