Fix baseline when direction-up positioning is used

#973

Author: cdjackson

src/common.css

@@ -47,6 +47,9 @@ body > .select2-container.open {
     border-top-right-radius: 0;
 }
 .ui-select-container[theme="select2"].direction-up .ui-select-dropdown {
+    bottom: 100%;
+    top: auto;
+
     border-radius: 4px; /* FIXME hardcoded value :-/ */
     border-bottom-left-radius: 0;
     border-bottom-right-radius: 0;
@@ -89,6 +92,9 @@ body > .select2-container.open {
 
 /* Handle up direction Selectize */
 .ui-select-container[theme="selectize"].direction-up .ui-select-dropdown {
+    bottom: 100%;
+    top: auto;
+
     box-shadow: 0 -4px 8px rgba(0, 0, 0, 0.25);
 
     margin-top: -2px; /* FIXME hardcoded value :-/ */
@@ -250,5 +256,7 @@ body > .ui-select-bootstrap.open {
 
 /* Handle up direction Bootstrap */
 .ui-select-container[theme="bootstrap"].direction-up .ui-select-dropdown {
+    bottom: 100%;
+    top: auto;
     box-shadow: 0 -4px 8px rgba(0, 0, 0, 0.25);
 }

src/uiSelectDirective.js

@@ -275,7 +275,6 @@ uis.directive('uiSelect',
               // Determine if the direction of the dropdown needs to be changed.
               if (offset.top + offset.height + offsetDropdown.height > $document[0].documentElement.scrollTop + $document[0].documentElement.clientHeight) {
                 dropdown[0].style.position = 'absolute';
-                dropdown[0].style.top = (offsetDropdown.height * -1) + 'px';
                 element.addClass(directionUpClassName);
               }