feat(design): correct bitcoin icon across all views

src/sass/icons.scss

@@ -14,6 +14,19 @@
   padding-left: 74px;
 }
 
+
+.icon-svg {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  > img {
+    background-repeat:no-repeat;
+    background-clip: padding-box;
+    background-size: contain;
+    height: 18px;
+  }
+}
+
 .big-icon-svg {
   padding: 0 7px;
   > .bg {

src/sass/ionic.scss

@@ -27,3 +27,14 @@ ion-tabs.ion-tabs-transparent {
     }
   }
 }
+
+// .placeholder-icon padding cannot be modified by a variable
+$placeholder-icon-padding: 10px;
+.placeholder-icon {
+  &:first-child {
+    padding-right: $placeholder-icon-padding;
+  }
+  &:last-child {
+    padding-left: $placeholder-icon-padding;
+  }
+}

src/sass/views/tab-receive.scss

@@ -32,9 +32,6 @@
       font-size: .8rem;
       i {
         font-size: 1.3rem;
-        &.ion-social-bitcoin-outline {
-          border-right: 1px solid rgb(228, 228, 228);
-        }
       }
     }
     .bit-address {
@@ -111,6 +108,10 @@
       margin-bottom:1rem;
     }
   }
+  .receive-tab-bitcoin-icon {
+    border-right: 1px solid rgb(228, 228, 228);
+    padding-right: 10px;
+  }
 }
 
 @keyframes fadeIn {