pgAdmin 4 commit: Fix file selection on Windows. Fixes #1319

Fix file selection on Windows. Fixes #1319

1) Unable to select sql file through query tool on windows OS. In file_manager.js, we are stripping initial slash '/' from the path obtained, but we should not strip if it is full path like 'c:/path/to/dir/filename.ext'

2) Handle directory path if STORAGE_DIR is None. Proper checks are added.

Branch
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master

Details
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http://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=9e8e3fc78755df29ac466234c880d848894eebab
Author: Surinder Kumar <surinder(dot)kumar(at)enterprisedb(dot)com>

Modified Files
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web/pgadmin/misc/file_manager/__init__.py | 4 +++-
.../templates/file_manager/js/file_manager.js | 22 ++++++++++++++++------
web/pgadmin/tools/sqleditor/__init__.py | 2 ++
web/pgadmin/utils/paths.py | 6 +++---
4 files changed, 24 insertions(+), 10 deletions(-)