If an argument to gettext() contains variables, strings extracted
and strings used when rendered will be different (as variables are
evaluated as empty during string extraction to POT).
As a result, translations for these strings aree never used.
This commit fixes the issue by defining strings with variable
substitions (like%(id)s) in gettext() combined with interpolate().
Labels of "Rule to edit" pulldown menu in "Edit Rule" form are
updated to match the format used in "Delete Rule" form.
Closes-Bug: #2037278
Change-Id: I06cb56ada2c842e5a445026b4649260bf9893841
783b2039f0