make xdebug messages above everything

This way we can actually read the message. Please note this actually hide
the content behind but I feel it is better to see the backtrace.

TODO: maybe add a debug.css stylesheets wich is only loaded for developers?

diff --git a/skins/common/shared.css b/skins/common/shared.css
index 7723164..4092593 100644 (file)
--- a/skins/common/shared.css
+++ b/skins/common/shared.css
@@ -1033,3 +1033,8 @@ table.floatleft {
        zoom: 1; /* http://webaim.org/techniques/skipnav/#iequirk */
 }
 
+/* For developpers */
+.xdebug-error {
+       position: absolute;
+       z-index: 99;
+}