Merge branch 'bootstrap-wells' into 'master'

Put back bootstrap wells

I removed bootstrap wells previously but we still need them for now. Will return to this later

See merge request !8150

app/assets/stylesheets/framework/tw_bootstrap.scss

@@ -35,7 +35,7 @@
 @import "bootstrap/alerts";
 // @import "bootstrap/progress-bars";
 @import "bootstrap/list-group";
-// @import "bootstrap/wells";
+@import "bootstrap/wells";
 @import "bootstrap/close";
 @import "bootstrap/panels";