cubicweb #2067561 improve rql bar: help managing the "rql: " prefix in queries [open]

I'm not quite sure what I'd like to see here, but not having to type the 'rql: ' prefix (which avoids the transformation of incorrect RQL to a has_text query) would help me greatly when I'm trying to write a query.

I think the RQL queries displayed in the RQL bar should always have the 'rql: ' prefix displayed for a start. And the "wipe field" button (see should probably leave the 'rql: ' prefix after erasing the field.

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