Fix: (org-ql-find) Go to base buffer if possible

Use the base buffer if it has one, because if we run the search from
an indirect buffer, it's likely already narrowed to a different entry,
and making an indirect buffer from that one would end up with a
restriction that would likely hide the selected entry.

org-ql.info

@@ -1074,7 +1074,13 @@ File: README.info,  Node: 084-pre,  Next: 083,  Up: Changelog
 5.1 0.8.4-pre
 =============
 
-Nothing new yet.
+*Fixes*
+
+   • Command ‘org-ql-find’ goes to the selected entry in the base buffer
+     (rather than potentially an indirect buffer, whose narrowing could
+     leave the selected entry hidden.  The nuances around going to
+     entries in buffers that may be indirect and/or narrowed are
+     surprisingly complicated.  Hopefully this is the last fix).
 
 
 File: README.info,  Node: 083,  Next: 082,  Prev: 084-pre,  Up: Changelog
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