changed bitcoin to bitcoin core in UI

www/views/includes/walletSelector.html

@@ -39,7 +39,7 @@
 
   <div class="subheader" ng-if="walletsBtc[0] && walletsBch[0]" translate>
     <img class="wallet-coin-logo" src="img/icon-bitcoin.svg" width="18">
-    <span translate>Bitcoin Wallets</span>
+    <span translate>Bitcoin Core Wallets</span>
   </div>
   <a
     ng-repeat="wallet in walletsBtc track by $index"

www/views/tab-home.html

@@ -81,7 +81,7 @@
     <div class="list card">
       <div class="item item-icon-right item-heading">
         <img class="wallet-coin-logo" src="img/icon-bitcoin.svg" width="18">
-        <span translate>Bitcoin Wallets</span>
+        <span translate>Bitcoin Core Wallets</span>
         <a ui-sref="tabs.add"><i class="icon ion-ios-plus-empty list-add-button"></i></a>
       </div>
       <div>

www/views/tab-settings.html

@@ -97,7 +97,7 @@
         <span ng-include="'views/includes/walletListSettings.html'"></span>
       </a>
 
-      <div class="item item-divider" ng-show="walletsBtc[0]">{{'Bitcoin Wallets' | translate}}</div>
+      <div class="item item-divider" ng-show="walletsBtc[0]">{{'Bitcoin Core Wallets' | translate}}</div>
 
       <a class="item item-icon-left item-icon-right" href
            ui-sref="tabs.preferences({'walletId': wallet.id})"