Increase z-index of frozen cells for correct rendering (#13334)

Change-Id: I3bf1fd2733e283c98a1ebb5ff260381ff4b5bfab

diff --git a/WebContent/VAADIN/themes/base/escalator/escalator.scss b/WebContent/VAADIN/themes/base/escalator/escalator.scss
index c6438ac9cc08620084b206d262e2f9985e4649bc..0246224fd3014a183125fa4a29eea73af43bec5c 100644 (file)
--- a/WebContent/VAADIN/themes/base/escalator/escalator.scss
+++ b/WebContent/VAADIN/themes/base/escalator/escalator.scss
@@ -114,7 +114,7 @@ $border-color: #aaa;
 
 .#{$primaryStyleName}-cell.frozen {
        position: relative;
-       z-index: 0;
+       z-index: 1;
 }
 
 }