pgAdmin 4 commit: Fixes #2328

Fixes #2328
1) Fixed issue of opening Query Tool and Debugger in new Tab with QT 5.8 and annulen webkit
2) Moved unload event of window from javascript files to html.
3) Change alertify messages for debugger.
4) Closed all connections created by debugger. Previously only one connection has been closed.

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=d0e9c82feaaa5d6b8face6b04f1fc8fddefc3507
Author: Neel Patel <neel(dot)patel(at)enterprisedb(dot)com>

Modified Files
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runtime/BrowserWindow.cpp | 108 ++++++++++++++++++++-
runtime/BrowserWindow.h | 35 ++++---
runtime/WebViewWindow.cpp | 44 +++++++++
runtime/WebViewWindow.h | 19 ++++
.../tools/datagrid/templates/datagrid/index.html | 7 ++
.../datagrid/templates/datagrid/js/datagrid.js | 22 +----
web/pgadmin/tools/debugger/__init__.py | 30 ++----
.../tools/debugger/templates/debugger/direct.html | 28 +++---
.../debugger/templates/debugger/js/debugger.js | 22 +----
.../debugger/templates/debugger/js/debugger_ui.js | 11 +--
.../tools/debugger/templates/debugger/js/direct.js | 99 ++++++++++++-------
11 files changed, 292 insertions(+), 133 deletions(-)