Merge #13251: GUI: Rephrase Bech32 checkbox texts, and enable it with legacy address default

82dda6b GUI: Allow generating Bech32 addresses with a legacy-address default (Luke Dashjr)
7ab1c6f GUI: Rephrase Bech32 checkbox text/tooltip (Luke Dashjr)

Pull request description:

  - "Bech32" isn't very user-friendly; used "native segwit" as in #11937.
  - You don't spend from addresses.
  - No reason to block off Bech32 access with legacy address default.

  Rebased from #12208

Tree-SHA512: c82dd20d967a7f47bcc75b25be0d3a8cf00cfccc1cd14916b87d70b9c56fd53e366b456348b173f36c89b145b76624413780abaed4cea82117a9ecd47dd8fb99

Author: MarcoFalke

src/qt/forms/receivecoinsdialog.ui

@@ -206,10 +206,10 @@
              <enum>Qt::StrongFocus</enum>
             </property>
             <property name="toolTip">
-             <string>Bech32 addresses (BIP-173) are cheaper to spend from and offer better protection against typos. When unchecked a P2SH wrapped SegWit address will be created, compatible with older wallets.</string>
+             <string>Native segwit addresses (aka Bech32 or BIP-173) reduce your transaction fees later on and offer better protection against typos, but old wallets don't support them. When unchecked, an address compatible with older wallets will be created instead.</string>
             </property>
             <property name="text">
-             <string>Generate Bech32 address</string>
+             <string>Generate native segwit (Bech32) address</string>
             </property>
            </widget>
           </item>

src/qt/receivecoinsdialog.cpp

@@ -94,14 +94,11 @@ void ReceiveCoinsDialog::setModel(WalletModel *_model)
         // Last 2 columns are set by the columnResizingFixer, when the table geometry is ready.
         columnResizingFixer = new GUIUtil::TableViewLastColumnResizingFixer(tableView, AMOUNT_MINIMUM_COLUMN_WIDTH, DATE_COLUMN_WIDTH, this);
 
-        // configure bech32 checkbox, disable if launched with legacy as default:
         if (model->wallet().getDefaultAddressType() == OutputType::BECH32) {
             ui->useBech32->setCheckState(Qt::Checked);
         } else {
             ui->useBech32->setCheckState(Qt::Unchecked);
         }
-
-        ui->useBech32->setVisible(model->wallet().getDefaultAddressType() != OutputType::LEGACY);
     }
 }
 
@@ -144,9 +141,14 @@ void ReceiveCoinsDialog::on_receiveButton_clicked()
     QString address;
     QString label = ui->reqLabel->text();
     /* Generate new receiving address */
-    OutputType address_type = model->wallet().getDefaultAddressType();
-    if (address_type != OutputType::LEGACY) {
-        address_type = ui->useBech32->isChecked() ? OutputType::BECH32 : OutputType::P2SH_SEGWIT;
+    OutputType address_type;
+    if (ui->useBech32->isChecked()) {
+        address_type = OutputType::BECH32;
+    } else {
+        address_type = model->wallet().getDefaultAddressType();
+        if (address_type == OutputType::BECH32) {
+            address_type = OutputType::P2SH_SEGWIT;
+        }
     }
     address = model->getAddressTableModel()->addRow(AddressTableModel::Receive, label, "", address_type);
     SendCoinsRecipient info(address, label,