pgAdmin 4 commit: Fixed some UX issue with the Import/Export tool.

Fixed some UX issue with the Import/Export tool.

- Couldn't click on the filename control once gets an error.
- Encoding is not in alphabetical order.

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=c4ca781ce2863375e2ee9105304187d7e951b419
Author: Khushboo Vashi <khushboo.vashi@enterprisedb.com>

Modified Files
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.../templates/databases/sql/9.2_plus/get_encodings.sql         |  2 +-
.../templates/databases/sql/default/get_encodings.sql          |  2 +-
web/pgadmin/static/js/backform.pgadmin.js                      | 10 ++++++++++
web/pgadmin/static/scss/_backform.overrides.scss               |  8 +++++++-
4 files changed, 19 insertions(+), 3 deletions(-)