(updated) toggle button styles

apps/block_scout_web/assets/css/app.scss

@@ -113,6 +113,7 @@ $fa-font-path: "~@fortawesome/fontawesome-free/webfonts";
 @import "components/modal_stake";
 @import "components/btn_copy";
 @import "components/btn_qr";
+@import "components/btn_dropdown_line";
 
 :export {
   primary: $primary;

apps/block_scout_web/assets/css/components/_btn_dropdown_line.scss

@@ -0,0 +1,6 @@
+$btn-dropdown-line-bg: #fff !default;
+$btn-dropdown-line-color: $primary !default;
+
+.btn-dropdown-line {
+    @include btn-line($btn-dropdown-line-bg, $btn-dropdown-line-color);
+}

apps/block_scout_web/lib/block_scout_web/templates/address_internal_transaction/index.html.eex

@@ -16,7 +16,7 @@
           </div>
         </div>
         <div class="dropdown float-right u-push-sm">
-          <button data-test="filter_dropdown" class="button button-secondary button-xs dropdown-toggle" type="button"
+          <button data-test="filter_dropdown" class="btn-dropdown-line dropdown-toggle" type="button"
             id="dropdownMenu2" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
             Filter: <%= format_current_filter(@filter) %>
           </button>

apps/block_scout_web/lib/block_scout_web/templates/address_transaction/index.html.eex

@@ -12,7 +12,7 @@
           </div>
         </div>
         <div class="dropdown float-right u-push-sm">
-          <button data-test="filter_dropdown" class="button button-secondary button-xs dropdown-toggle" type="button"
+          <button data-test="filter_dropdown" class="btn-dropdown-line dropdown-toggle" type="button"
             id="dropdownMenu2" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
             Filter: <%= format_current_filter(@filter) %>
           </button>