Added search object functionality. Fixes #2172

docs/en_US/search_objects.rst

@@ -0,0 +1,34 @@
+.. _search_objects:
+
+***********************
+`Search objects`:index:
+***********************
+
+.. image:: images/search_objects.png
+    :alt: Search objects dialog
+    :align: center
+
+With this dialog, you can search for almost any kind of objects in a
+database.
+
+You can access it by right clicking a database or any of its child nodes
+and select "Search objects". You can also access it by hitting the
+shortcut (default ALT+SHIFT+S).
+
+The minimum pattern length are 3 characters. The search performed is
+non-casesensitive and will find all objets whose name contains the pattern.
+You can only search for object names.
+
+The result is presented in the grid with object name, object type and
+the object tree path in the :ref:`browser <tree_control>`. You can double
+click on a result row to select the object in the
+:ref:`browser <tree_control>`. If the object is greyed out, this means that you
+have not enabled those object types in the :ref:`preferences <preferences>`,
+so you can't double click on it.
+
+You can filter based on a particular object type by selecting one from the
+object type dropdown. If the search button is hit when one of the object type
+is selected then only those types will be fetch from the database.
+An object type will not be visible in the dropdown if the database server
+does not support it or if it is not enabled from the 
+:ref:`preferences <preferences>`.