Merge #7195: backport: cherry-pick #7191 and #7193 into v23.1.x

240a95f Merge #7193: fix: reject identity elements in deserialization and key generation (pasta)
444cbf2 Merge #7191: fix(qt): reseat quorum labels when new types are inserted (pasta)

Pull request description:

  ## Backport

  Cherry-picks of #7191 and #7193 into `v23.1.x`.

  ### Included

  - #7193 — `fix: reject identity elements in deserialization and key generation` (42b707b)
  - #7191 — `fix(qt): reseat quorum labels when new types are inserted` (641b3ea)

ACKs for top commit:
  UdjinM6:
    utACK 240a95f

Tree-SHA512: dc270139159974b3bdab9177a7215de201d4deecc7883d47e35174fe7073c3508e61313e99e554b5a646ceb179202c96eb170e53dc9fc01177349aaa840acf2b

Author: PastaPastaPasta

src/bls/bls.cpp

@@ -66,6 +66,9 @@ void CBLSSecretKey::MakeNewKey()
         GetStrongRandBytes({buf, sizeof(buf)});
         try {
             impl = bls::PrivateKey::FromBytes(bls::Bytes(reinterpret_cast<const uint8_t*>(buf), SerSize));
+            if (impl == bls::PrivateKey()) {
+                continue;
+            }
             break;
         } catch (...) {
         }

src/bls/bls.h

@@ -111,6 +111,11 @@ class CBLSWrapper
         } else {
             try {
                 impl = ImplType::FromBytes(bls::Bytes(vecBytes.data(), vecBytes.size()), specificLegacyScheme);
+                if (impl == ImplType()) {
+                    Reset();
+                    cachedHash.SetNull();
+                    return;
+                }
                 fValid = true;
             } catch (...) {
                 Reset();

src/qt/networkwidget.cpp

@@ -240,6 +240,7 @@ void NetworkWidget::handleQrDataChanged()
             it->second.second->setToolTip(tr("Waiting for blockchain sync…"));
             grid->addWidget(it->second.first, current_row, 0);
             grid->addWidget(it->second.second, current_row, 1);
+            needs_reseating = true;
         } else if (needs_reseating) {
             grid->removeWidget(it->second.first);
             grid->removeWidget(it->second.second);