add input method hints

electrum/gui/qml/components/Receive.qml

@@ -39,6 +39,7 @@ Pane {
             id: amount
             font.family: FixedFont
             Layout.fillWidth: true
+            inputMethodHints: Qt.ImhPreferNumbers
         }
 
         Label {
@@ -82,6 +83,7 @@ Pane {
             id: amountFiat
             font.family: FixedFont
             Layout.fillWidth: true
+            inputMethodHints: Qt.ImhDigitsOnly
         }
 
         Label {

electrum/gui/qml/components/SeedTextArea.qml

@@ -7,11 +7,12 @@ TextArea {
     id: seedtext
     Layout.fillWidth: true
     Layout.minimumHeight: 80
-    rightPadding: 16
-    leftPadding: 16
+    rightPadding: constants.paddingLarge
+    leftPadding: constants.paddingLarge
     wrapMode: TextInput.WordWrap
     font.bold: true
-    font.pixelSize: 18
+    font.pixelSize: constants.fontSizeLarge
+    inputMethodHints: Qt.ImhSensitiveData | Qt.ImhPreferLowercase | Qt.ImhNoPredictiveText
     background: Rectangle {
         color: "transparent"
         border.color: Material.accentColor

electrum/gui/qml/components/Send.qml

@@ -42,6 +42,7 @@ Pane {
             id: amount
             font.family: FixedFont
             placeholderText: qsTr('Amount')
+            inputMethodHints: Qt.ImhPreferNumbers
         }
 
         Label {