[pgAdmin][Patch] #4059 Query Tool button in Query Tool to open a new Query Window

Hi Hackers,

Please find the attached patch below which adds the functionality of the
query tool button in the query tool sqleditor.

*Acceptance criteria:*
- For sqleditor on same window & on new tab:

- When a query tool connection is initiated, as expected it will open
the connection based on the selected database in the treeview. Now, when
the user clicks the query tool connection button on the query tool window,
irrespective of the selected database in treeview, it should open a
connection based on the query tool connected database.
- Similarly, for a new tab, clicking on the query tool connection
button, it should open a connection based on the query tool connected
database, instead of selected treeview node.

[image: query tool button.png]

Additionally, an error is handled in the form of message dialog prompting
the user to initiate the connection, when sqleditor is opened in the new
tab with the main application window kept closed. This can be reviewed by
refreshing the window as well as clicking on the query tool connection
button.

A prompt dialog message box is seen as:

[image: Screen Shot 2020-08-27 at 8.04.33 PM.png]

--
*Rahul Shirsat*
Software Engineer | EnterpriseDB Corporation.