fix(bootstrap): prevent wrong caret shadow

Author: dimirc

src/common.css

@@ -78,7 +78,7 @@
 
 .ui-select-bootstrap .ui-select-toggle > .caret {
   position: absolute;
-  height: 100%;
+  height: 10px;
   top: 50%;
   right: 10px;
   margin-top: -2px;