Hopefully ake cancel dialog a bit less weird

There's no design on how to fix this so I've switched the buttons
and made the primary not a danger button. We could also try some
different wording, eg. 'abort' rather than 'cancel' because with
'ancel' it's not clear if you're cancelling whatever you were trying
to do or the dialog asking you if you want to cancel...

Ideal might be to make the cancel button red but that means making
it a separate button or adding support for doing so to DialogButtons,
so not going to do that unless we're sure that's what we want.

Fixes https://github.com/vector-im/riot-web/issues/14140

src/CrossSigningManager.js

@@ -54,11 +54,11 @@ async function confirmToDismiss(name) {
     const [sure] = await Modal.createDialog(QuestionDialog, {
         title: _t("Cancel entering passphrase?"),
         description,
-        danger: true,
-        cancelButton: _t("Enter passphrase"),
-        button: _t("Cancel"),
+        danger: false,
+        button: _t("Enter passphrase"),
+        cancelButton: _t("Cancel"),
     }).finished;
-    return sure;
+    return !sure;
 }
 
 async function getSecretStorageKey({ keys: keyInfos }, ssssItemName) {