Txhistory fixes (#4150)

* Fix undefined variable

* Tx history window: removig always on top setting

Author: evertonfraga

interface/components/TxHistory/TxRow.js

@@ -12,7 +12,7 @@ class TxRow extends Component {
   valueToEtherAmount = value => {
     const theValue = web3.utils.isHex(value)
       ? new BigNumber(web3.utils.hexToNumberString(value))
-      : new BigNumber(tx.value);
+      : new BigNumber(value);
     const etherAmount = theValue
       .dividedBy(new BigNumber('1000000000000000000'))
       .toFixed();

modules/windows.js

@@ -478,7 +478,7 @@ class Windows {
           electronOptions: {
             width: 580,
             height: 465,
-            alwaysOnTop: true,
+            alwaysOnTop: false,
             enableLargerThanScreen: false,
             resizable: true
           }