force display "inline" only when it's a span

Former-commit-id: 841468d1d32e7525fd5f2e30fc3c079da32cfc16

extension/ui/editor/editor-frame-web.css

@@ -1,24 +1,36 @@
 .single-file-highlight-yellow {
     background-color: #ffff7c !important;
     color: black !important;
+}
+
+span.single-file-highlight-yellow {
     display: inline !important;
 }
 
 .single-file-highlight-pink {
     background-color: #ffbbb6 !important;
     color: black !important;
+}
+
+span.single-file-highlight-pink {
     display: inline !important;
 }
 
 .single-file-highlight-blue {
     background-color: #95d0ff !important;
     color: black !important;
+}
+
+span.single-file-highlight-blue {
     display: inline !important;
 }
 
 .single-file-highlight-green {
     background-color: #93ef8d !important;
     color: black !important;
+}
+
+span.single-file-highlight-green {
     display: inline !important;
 }