Fixes less compilation problems in Magento's luma theme while also fixing:

- Magento_CatalogSearch module: hides legend in advanced search form
- Magento_Sales module: adds print icon to print link for sales objects in order history
- Magento_AdvancedCheckout module: not sure, can't test at the moment

Author: hostep

app/design/frontend/Magento/luma/Magento_AdvancedCheckout/web/css/source/_module.less

@@ -48,12 +48,6 @@
             }
 
             .block-content {
-                &:extend(.abs-add-clearfix-desktop all);
-
-                .box {
-                    &:extend(.abs-blocks-2columns all);
-                }
-
                 .actions-toolbar {
                     clear: both;
                     .lib-actions-toolbar(
@@ -188,4 +182,16 @@
             &:extend(.abs-add-clearfix-desktop all);
         }
     }
+
+    .column {
+        .block-addbysku {
+            .block-content {
+                &:extend(.abs-add-clearfix-desktop all);
+
+                .box {
+                    &:extend(.abs-blocks-2columns all);
+                }
+            }
+        }
+    }
 }

app/design/frontend/Magento/luma/Magento_CatalogSearch/web/css/source/_module.less

@@ -18,7 +18,7 @@
 //  _____________________________________________
 
 & when (@media-common = true) {
-    
+
     .search {
         .fieldset {
             .control {
@@ -31,7 +31,7 @@
             }
         }
     }
-    
+
     .block-search {
         margin-bottom: 0;
 
@@ -136,8 +136,6 @@
     }
 
     .form.search.advanced {
-        &:extend(.abs-forms-general-desktop all);
-
         .fields.range {
             .field {
                 &:first-child {
@@ -275,4 +273,8 @@
     .search-autocomplete {
         margin-top: 0;
     }
+
+    .form.search.advanced {
+        &:extend(.abs-forms-general-desktop all);
+    }
 }

app/design/frontend/Magento/luma/Magento_Sales/web/css/source/_module.less

@@ -307,7 +307,6 @@
             margin-right: 30px;
 
             &.print {
-                &:extend(.abs-action-print all);
                 display: none;
                 margin: 0;
             }
@@ -585,6 +584,7 @@
 
     .order-actions-toolbar {
         .action.print {
+            &:extend(.abs-action-print all);
             display: block;
             float: right;
         }
@@ -705,7 +705,7 @@
     }
 }
 
-.media-width(@extremum, @break) when (@extremum = 'min') and (@break = @screen__l) { 
+.media-width(@extremum, @break) when (@extremum = 'min') and (@break = @screen__l) {
     .order-links {
         .item {
             margin: 0 @tab-control__margin-right 0 0;