pgAdmin 4 commit: Query tool file handling cleanup. Fixes #1460

Query tool file handling cleanup. Fixes #1460

- Opening a file should set the tab name to the filename
- Editing a file should add a * to the tab name to indicate the file is dirty
- Saving changes to a file should clear the *
- The Save button should have a drop-down menu, with a Save As option.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=a7d7577c7c838904123fb8183890b3d6c41ae8a5
Author: Harshal Dhumal <harshal.dhumal@enterprisedb.com>

Modified Files
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.../tools/datagrid/templates/datagrid/index.html   | 16 ++++++
.../sqleditor/templates/sqleditor/js/sqleditor.js  | 64 ++++++++++++++++++----
2 files changed, 69 insertions(+), 11 deletions(-)