pgAdmin 4 commit: 1) Ensure that the zoom level should be set for the n

1) Ensure that the zoom level should be set for the newly opened window.
2) Ensure that if the zoom level is changed on the main window then it should
   be applicable for all the opened windows.

refs #6271

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgadmin4.git;a=commitdiff;h=2872b5c5d3f0e0a891f954a21e45b0b5cba5bec8

Modified Files
--------------
runtime/src/js/misc.js                             | 13 +++++++++
runtime/src/js/pgadmin.js                          | 10 ++++---
web/pgadmin/browser/__init__.py                    | 34 ++++++++++++----------
web/pgadmin/tools/datagrid/static/js/datagrid.js   |  4 +++
.../tools/datagrid/static/js/show_query_tool.js    |  2 +-
web/pgadmin/tools/debugger/static/js/debugger.js   |  8 +++++
.../tools/debugger/static/js/debugger_ui.js        |  4 +++
web/pgadmin/tools/erd/static/js/erd_module.js      |  4 +++
.../tools/schema_diff/static/js/schema_diff.js     |  4 +++
9 files changed, 62 insertions(+), 21 deletions(-)