Fixes some less compilation problems in Magento's blank theme.

Author: hostep

app/design/frontend/Magento/blank/Magento_Checkout/web/css/source/module/checkout/_estimated-total.less

@@ -15,7 +15,6 @@
 
     .opc-estimated-wrapper {
         &:extend(.abs-add-clearfix all);
-        &:extend(.abs-no-display-desktop all);
         .lib-css(border-bottom, @border-width__base solid @color-gray80);
         margin: 0 0 15px;
         padding: 18px 15px;
@@ -37,7 +36,7 @@
                     &:before {
                         .lib-css(color, @button__color);
                     }
-                    
+
                     &:hover:before {
                         .lib-css(color, @button__hover__color);
                     }
@@ -53,6 +52,6 @@
 
 .media-width(@extremum, @break) when (@extremum = 'min') and (@break = @screen__m) {
     .opc-estimated-wrapper {
-        display: none;
+        &:extend(.abs-no-display-desktop all);
     }
 }

app/design/frontend/Magento/blank/Magento_GiftMessage/web/css/source/_module.less

@@ -18,7 +18,6 @@
 & when (@media-common = true) {
     .gift-message {
         .field {
-            &:extend(.abs-clearfix all);
             margin-bottom: @indent__base;
 
             .label {

app/design/frontend/Magento/blank/Magento_GiftRegistry/web/css/source/_module.less

@@ -72,10 +72,6 @@
     .form-giftregistry-search {
         margin-bottom: @indent__l*2;
 
-        .legend {
-            &:extend(.abs-account-title all);
-        }
-
         .fields-specific-options {
             .field {
                 &:nth-last-of-type(1) {

app/design/frontend/Magento/blank/Magento_MultipleWishlist/web/css/source/_module.less

@@ -180,10 +180,6 @@
     }
 
     .block-wishlist-search-form {
-        .block-title {
-            &:extend(.abs-account-title all);
-        }
-
         .form-wishlist-search {
             margin-bottom: @indent__l * 2;
             max-width: 500px;
@@ -218,7 +214,7 @@
         .block-title {
             .lib-font-size(22);
             margin-bottom: @indent__base;
-            
+
             > strong {
                 font-weight: @font-weight__light;
             }

app/design/frontend/Magento/blank/Magento_Multishipping/web/css/source/_module.less

@@ -189,7 +189,6 @@
 
         .block-title,
         .block-content .title {
-            &:extend(.abs-account-title all);
             border-bottom: @border-width__base solid @border-color__base;
             padding-bottom: @indent__s;
 

app/design/frontend/Magento/blank/Magento_Review/web/css/source/_module.less

@@ -17,7 +17,7 @@
 & when (@media-common = true) {
     .rating-summary {
         .lib-rating-summary();
-        
+
         .rating-result {
             margin-left: -5px;
         }
@@ -299,7 +299,6 @@
             display: table;
             margin-bottom: @indent__s;
             max-width: 100%;
-            &:extend(.abs-rating-summary all);
         }
 
         &-author {