Merge pull request #9721 from overleaf/ii-cm6-grammarly-dark-theme

[web] Grammarly suggestions underline

GitOrigin-RevId: 37d3117e8465052f26e81c58b7f07eefee8e0fe7

services/web/frontend/stylesheets/_style_includes.less

@@ -105,6 +105,7 @@
 @import 'app/open-in-overleaf.less';
 @import 'app/primary-email-check';
 @import 'app/project-url-lookup';
+@import 'app/grammarly';
 
 // module styles
 // TODO: find a way for modules to add styles dynamically

services/web/frontend/stylesheets/app/grammarly.less

@@ -0,0 +1,3 @@
+grammarly-extension {
+  mix-blend-mode: normal;
+}