Patches for creating Casts and Conversions

Hello, pgAdmin team!

I'm use pgadmin3 1.22.0.

So, I have 2 patches, that allows you to create Casts and Conversion.

1. Casts.

- I create function integer_to_text(INTEGER value) that returns TEXT value;
- I click on casts icon in pgadmin tree;
- Next, I specify IN type (integer) and OUT type (text)
- I open function combobox at this panel, but I don't find some functions (i.e. integer_to_text).
So, the patch dlgCast.patch fix it.

2. Conversion.

- I click on conversions in pgadmin tree;
- Next, I specify conversion name as test_conversion;
- On next panel I specify input and output encodings;
- Function's combobox is not available, and I can't specify functions for execution and enter the names.
So, the patch dkgConversion.patch fix it.

Please, correct me if I'm not right. Thank you.

-- 
Best regards, Dmitry Voronin