Fold submit and buy ether into one button slot

ui/app/components/pending-tx.js

@@ -66,6 +66,7 @@ PendingTx.prototype.render = function () {
 
   const balanceBn = hexToBn(balance)
   const insufficientBalance = balanceBn.lt(maxCost)
+  const buyDisabled = insufficientBalance || !this.state.valid || !isValidAddress || this.state.submitting
 
   this.inputs = []
 
@@ -297,14 +298,6 @@ PendingTx.prototype.render = function () {
             margin: '14px 25px',
           },
         }, [
-
-
-          insufficientBalance ?
-            h('button.btn-green', {
-              onClick: props.buyEth,
-            }, 'Buy Ether')
-          : null,
-
           h('button', {
             onClick: (event) => {
               this.resetGasFields()
@@ -312,12 +305,13 @@ PendingTx.prototype.render = function () {
             },
           }, 'Reset'),
 
-          // Accept Button
+          // Accept Button or Buy Button
+          insufficientBalance ? h('button.btn-green', { onClick: props.buyEth }, 'Buy Ether') :
             h('input.confirm.btn-green', {
               type: 'submit',
               value: 'SUBMIT',
               style: { marginLeft: '10px' },
-            disabled: insufficientBalance || !this.state.valid || !isValidAddress || this.state.submitting,
+              disabled: buyDisabled,
             }),
 
           h('button.cancel.btn-red', {