Feature request: suport to run SQL commands

[JCKodel]

I used to use a custom version of sqlite_viewer with a textbox that I can use to run arbitray SQL code (including insert and update).
It's very handy for resseting some value to re-test a page, for example.

In this example: I'm resseting my user's gender, so I can re-test my gender edit page:

In this case, exceptions are shown within an alert dialog and after the query is executed, the current table is refreshed (doesn't matter if the update is for this table or not).