fix(content-explorer): remove base styles (#4063)

* fix(content-explorer): remove base styles

* fix: lower specificity for non-migrated elements

Author: tjuanitas

src/elements/common/base.scss

@@ -66,12 +66,6 @@
 .be {
     @include reset;
 
-    // links have tag styles
-    @import '../../styles/common/links';
-
-    // Forms have tag styles
-    @import '../../styles/common/forms';
-    @include be-content;
     /* stylelint-disable declaration-no-important */
     box-sizing: border-box !important;
     width: 100%;
@@ -89,6 +83,20 @@
     }
 }
 
+// Elements migrated to Blueprint should not use base styles
+.bcow,
+.bcp,
+.bcpr,
+.bcs,
+.bdl-UnifiedShareForm {
+    // links have tag styles
+    @import '../../styles/common/links';
+
+    // Forms have tag styles
+    @import '../../styles/common/forms';
+    @include be-content;
+}
+
 .be-modal {
     // This class can be used to apply the base content reset to portalled elements are outside of the .be root
     // Also add the .be class to the inner content to get the rest of the styles