Various misc fixes:

- Using the 'gettext' as oppose to '_', which is not defined
- Define missing variables
- Fixed escape character in string with double quote
- Removed some dead code in a test case
- Removed unnecessary self assignment

Includes some fixes for Accessibility improvements
- Use semantic markup to mark emphasized or special text
- Added hidden legend in <fieldset> for better screen reader support

web/pgadmin/browser/server_groups/servers/databases/schemas/packages/__init__.py

@@ -259,6 +259,7 @@ class PackageView(PGChildNodeView, SchemaDiffObjectCompare):
         Returns:
 
         """
+        res = []
         SQL = render_template(
             "/".join([self.template_path, 'properties.sql']),
             scid=scid, pkgid=pkgid
@@ -778,7 +779,7 @@ class PackageView(PGChildNodeView, SchemaDiffObjectCompare):
         if sql is None:
             return None
         start = 0
-        start_position = re.search("\s+[is|as]+\s+", sql, flags=re.I)
+        start_position = re.search("\\s+[is|as]+\\s+", sql, flags=re.I)
 
         if start_position:
             start = start_position.start() + 4