qml: show explanatory text when sharing partially signed tx

after creating a multisig transaction

electrum/gui/qml/components/ExportTxDialog.qml

@@ -51,13 +51,12 @@ ElDialog {
                     }
                 }
 
-                Label {
+                InfoTextArea {
+                    Layout.fillWidth: true
+                    Layout.margins: constants.paddingLarge
                     visible: dialog.text_help
                     text: dialog.text_help
-                    wrapMode: Text.Wrap
-                    Layout.fillWidth: true
                 }
-
             }
         }
 

electrum/gui/qml/components/TxDetails.qml

@@ -24,8 +24,11 @@ Pane {
         app.stack.pop()
     }
 
-    function showExport() {
-        var dialog = exportTxDialog.createObject(root, { txdetails: txdetails })
+    function showExport(helptext) {
+        var dialog = exportTxDialog.createObject(root, {
+            txdetails: txdetails,
+            text_help: helptext
+        })
         dialog.open()
     }
 

electrum/gui/qml/components/WalletMainView.qml

@@ -400,7 +400,7 @@ Item {
                 onFinishedSave: {
                     // tx was (partially) signed and saved. Show QR for co-signers or online wallet
                     var page = app.stack.push(Qt.resolvedUrl('TxDetails.qml'), { txid: txid })
-                    page.showExport()
+                    page.showExport(qsTr('Transaction created and partially signed by this wallet. Present this QR code to the next co-signer'))
                     _confirmPaymentDialog.destroy()
                 }
             }