adding explanation to clear cache feature

src/sass/views/tab-settings.scss

@@ -3,7 +3,7 @@
     color: $dark-gray;
     border-color: rgba(221, 221, 221, 0.3);
   }
-  &-explaination, &-button-group {
+  &-explanation, &-button-group {
     padding: 0 1rem;
     margin: 1rem 0;
   }

www/views/advancedSettings.html

@@ -38,7 +38,7 @@
       </div>
 
       <div class="item item-divider" translate>Experimental Features</div>
-      <div class="settings-explaination">
+      <div class="settings-explanation">
         <div class="settings-description" translate>
           These features aren't quite ready for primetime. They may change, stop working, or disappear at any time.
         </div>

www/views/paperWallet.html

@@ -7,7 +7,7 @@
 
   <ion-content>
     <div class="settings" class="row" ng-show="needsBackup">
-      <div class="settings-explaination">
+      <div class="settings-explanation">
         <div class="settings-heading" translate>Backup Needed</div>
         <div class="settings-description" translate>
           Before receiving funds, you must backup your wallet. If this device is lost, it is impossible to access your funds without a backup.

www/views/preferencesAlias.html

@@ -7,7 +7,7 @@
     </ion-nav-back-button>
   </ion-nav-bar>
   <ion-content>
-    <div class="settings-explaination">
+    <div class="settings-explanation">
       <div class="settings-heading" translate>What do you call this wallet?</div>
       <div class="settings-description" translate>When this wallet was created, it was called &ldquo;{{walletName}}&rdquo;. You can change the name displayed on this device below.</div>
     </div>

www/views/preferencesEmail.html

@@ -7,7 +7,7 @@
     </ion-nav-back-button>
   </ion-nav-bar>
   <ion-content>
-    <div class="settings-explaination">
+    <div class="settings-explanation">
       <div class="settings-description" translate>
         You'll receive email notifications about payments sent and received from {{wallet.name}}.
       </div>

www/views/preferencesFee.html

@@ -7,7 +7,7 @@
     </ion-nav-back-button>
   </ion-nav-bar>
   <ion-content>
-    <div class="settings-explaination">
+    <div class="settings-explanation">
       <div class="settings-heading" translate>Bitcoin transactions include a fee collected by miners on the network.</div>
       <div class="settings-description" translate>The higher the fee, the greater the incentive a miner has to include that transaction in a block. Current fees are determined based on network load and the selected policy.</div>
       <div class="estimates" ng-repeat="fee in feeLevels.livenet" ng-if="fee.level == currentFeeLevel">

www/views/preferencesHistory.html

@@ -5,7 +5,7 @@
     </ion-nav-back-button>
   </ion-nav-bar>
   <ion-content>
-    <div class="item item-divider"></div>
+    <div class="item item-divider" ng-show="!isCordova"></div>
     <a class="item ng-hide" href ng-show="csvReady && !isCordova" ng-csv="csvContent" csv-header="csvHeader" filename="Copay-{{wallet.name}}.csv">
       <span translate>Export to file</span>
     </a>
@@ -18,8 +18,14 @@
         {{err | translate}}
       </span>
     </a>
+    <div class="item item-divider"></div>
     <a class="item" ng-click="clearTransactionHistory()">
-      <span class="assertive" translate>Clear cache</span>
+      <span translate>Clear cache</span>
     </a>
+    <div class="settings-explanation">
+      <div class="settings-description" translate>
+        The transaction history and every new incoming transaction are cached in the app. This feature clean this up and synchronizes again from the server
+      </div>
+    </div>
   </ion-content>
 </ion-view>

www/views/preferencesInformation.html

@@ -90,7 +90,7 @@
         <div class="item item-divider" translate>
           Latest Wallet Addresses
         </div>
-        <div class="settings-explaination">
+        <div class="settings-explanation">
           <div class="settings-description" translate>
             Only &ldquo;main&rdquo; addresses are shown below. This excludes &ldquo;change&rdquo; address.
           </div>
@@ -99,7 +99,7 @@
           <span>{{a.address}}</span>
           <span class="item-note">{{a.path}} &middot;  {{a.createdOn *1000  | amDateFormat:'MMMM Do YYYY, h:mm a' }}</span>
         </div>
-        <div class="settings-explaination">
+        <div class="settings-explanation">
           <div class="settings-description" translate>
             Please note: due to resource constraints, this list of addresses is not verified locally. A compromised BWS node could return addresses which are not controlled by this wallet.
           </div>