Invert indent switch behaviour for clarity

Currently the UI defaults to having indenting enabled when a query is performed, with a checkbox available to turn indenting off when checked.  This change would simply have the checkbox labeled "indent" or "indent on", and it would be checked by default.  Then a user could uncheck it to turn off indenting.  This helps keep the UI clear instead of having the user "enable" a box to disable a feature.

Also, the indent parameter would always be passed into the query so that it's clear to the user how it works; as it stands, we only pass `indent=false` when the "indent off" box is checked.