Fix an issue where the dropdown becomes misaligned/displaced. Fixes #4138

docs/en_US/release_notes.rst

@@ -11,6 +11,7 @@ notes for it.
 .. toctree::
    :maxdepth: 1
 
+   release_notes_4_6
    release_notes_4_5
    release_notes_4_4
    release_notes_4_3

docs/en_US/release_notes_4_6.rst

@@ -0,0 +1,17 @@
+***********
+Version 4.6
+***********
+
+Release date: 2019-05-02
+
+This release contains a number of new features and fixes reported since the
+release of pgAdmin4 4.5
+
+Features
+********
+
+
+Bug fixes
+*********
+
+| `Bug #4138 <https://redmine.postgresql.org/issues/4138>`_ - Fix an issue where the dropdown becomes misaligned/displaced.

web/pgadmin/static/js/backform.pgadmin.js

@@ -1910,6 +1910,7 @@ define([
         multiple: false,
         emptyOptions: false,
         preserveSelectionOrder: false,
+        isDropdownParent: false,
       },
     }),
 
@@ -1987,6 +1988,7 @@ define([
         multiple: false,
         emptyOptions: false,
         preserveSelectionOrder: false,
+        isDropdownParent: false,
       });
 
       // Evaluate the disabled, visible, and required option
@@ -2015,6 +2017,13 @@ define([
       if (!data.visible)
         this.$el.addClass(Backform.hiddenClassName);
 
+      // Dropdown body can be render at user given location
+      // If isDropdownParent flag is set to true then, By default we will
+      // display it on the control itself.
+      if (data.select2.isDropdownParent) {
+        select2Opts.dropdownParent = data.select2.dropdownParent || this.$el;
+      }
+
       this.$el.html(this.template(data)).addClass(field.name);
 
       var select2Opts = _.extend({