Add prefixes/filters #26
Description
Add a (hopefully flexible) mechanism for results providers to offer a prefix to narrow down results to only their results, e.g. #SomeObjectName, !SomeToolName, ?SomePreferenceName or verbose ones Object:SomeObjectName, Tool:SomeToolName, Preference:SomePreferenceName.
If flexible enough, add a mechanism for results providers to offer additional filters/narrowing options, e.g. search only children of the currently-selected object with Child:, search only objects of the current document with Opened:, search only boolean parameters with bool:…
A first version could just leave the text as-is in the search bar, an improved version would replace it with a widget which takes the place of a character (probably will need to fake it by positioning the object relative to the search box, and adding enough padding to the left, or even replacing the search icon to e.g. a small cube icon & placeholder text to e.g. "Search objects…", and handling the backspace key gracefully to revert the filter).