Changed validators to regexp validators

IntValidator limits to 32bit int (JavaScript limitation) and therefor
the input fields are limited in length.

ethereal/assets/qml/newTransaction/_new_contract.qml

@@ -61,7 +61,7 @@ Component {
 			id: txValue
 			width: 200
 			placeholderText: "Amount"
-			validator: IntValidator { }
+			validator: RegExpValidator { regExp: /\d*/ }
 			onTextChanged: {
 				contractFormReady()
 			}
@@ -69,7 +69,7 @@ Component {
 		TextField {
 			id: txGas
 			width: 200
-			validator: IntValidator { }
+			validator: RegExpValidator { regExp: /\d*/ }
 			placeholderText: "Gas"
 			onTextChanged: {
 				contractFormReady()
@@ -79,7 +79,7 @@ Component {
 			id: txGasPrice
 			width: 200
 			placeholderText: "Gas price"
-			validator: IntValidator { }
+			validator: RegExpValidator { regExp: /\d*/ }
 			onTextChanged: {
 				contractFormReady()
 			}

ethereal/assets/qml/newTransaction/_simple_send.qml

@@ -56,9 +56,10 @@ Component {
 		}
 		TextField {
 			id: txSimpleValue
+			width: 200
 			placeholderText: "Amount"
 			anchors.rightMargin: 5
-			validator: IntValidator { }
+			validator: RegExpValidator { regExp: /\d*/ }
 			onTextChanged: { checkFormState() }
 		}
 		Button {