Merge branch '541-gene-variants-visibility' into 'devel_12.1.x'

Resolve "Gene variants visibility"

See merge request !462

frontend-js/src/main/css/global.css

@@ -836,3 +836,7 @@ https://www.w3schools.com/css/tryit.asp?filename=trycss_tooltip
 .minerva-overlay-panel {
     overflow-x: hidden;
 }
+
+.pileup-root .controls input[type="text"] {
+    width: 180px;
+}