Merge branch 'client-456-export-btn' of https://github.com/wavesplatform/WavesGUI into client-473-release

Author: tsigel

src/modules/ui/directives/button/button.less

@@ -121,6 +121,7 @@ w-button {
       background-color: @color-white;
       border: 1px solid @color-accent-50;
       color: @color-basic-500;
+      font-family: @font-roboto-medium;
 
       &:hover, &.hover {
         border-color: @color-basic-500;

src/modules/wallet/modules/transactions/less/transactions.less

@@ -25,7 +25,7 @@
   }
 
   button.download {
-    background: url(/img/icons/download.svg) 20px center no-repeat;
+    background: url(/img/icons/download.svg) 20px center no-repeat @color-white;
     padding-left: 40px;
   }
 

src/modules/wallet/modules/transactions/templates/transactions.html

@@ -22,7 +22,7 @@
             </w-radio>
         </w-radio-wrap>
 
-        <w-button class="download" ng-click="$ctrl.exportTransactions()" class="interface">
+        <w-button class="download interface" ng-click="$ctrl.exportTransactions()">
             <w-i18n>export</w-i18n>
         </w-button>