Fix font size of eth display for 576-780px vw

ui/app/components/tx-view.js

@@ -99,8 +99,6 @@ TxView.prototype.render = function () {
       // mobile: 100px 100px
       h('img.hero-balance-icon', {
         src: '../images/eth_logo.svg',
-        width: '60px',
-        height: '60px',
         style: {}
       }),
 

ui/app/css/itcss/components/hero-balance.scss

@@ -1,4 +1,5 @@
 $break-small: 575px;
+$break-medium: 780px;
 $break-large: 576px;
 
 .hero-balance {
@@ -42,13 +43,25 @@ $break-large: 576px;
       margin-left: 1.2vw;
 
       .token-amount {
-        font-size: 2.2vw;
+        font-size: 2.1vw;
+
+        @media screen and (max-width: $break-medium) {
+          font-size: 3vw;
+        }
+
       }
 
       .fiat-amount {
         font-size: 1.7vw;
         margin-top: 0.3em;
+
+        @media screen and (max-width: $break-medium) {
+          font-size: 2.5vw;
+          margin-top: 0em;
+        }
+
       }
+
     }
 
   }
@@ -57,6 +70,12 @@ $break-large: 576px;
     border-radius: 30px;
     // TODO: colors
     border: 1px solid #DEDEDE; 
+    width: 5vw;
+    height: 5vw;
+    min-width: 45px;
+    min-height: 45px;
+    max-width: 65px;
+    max-height: 65px;
   }
 
   .hero-balance-buttons {