Deleting an editor while currentEditorChanged is apparently not a good
idea.
Use a queued connection instead.

This reverts commits 243a6259,
447c4ed3,
d9602ca5 and
31034870.

Change-Id: Iccbee25fb77714963faa6f7184d1f5f53ed348a6
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

Change-Id: I76d5e421258eda85907e56762a59894ce7f84f13
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

The leaves in the treeview contained qualified ids.

Change-Id: I290eaf9b1e666b6879d6d4b1f2483cfe7fb85362
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

This will make it easier to use a single SearchSymbols instance and a
single run serving all locator filters.

Change-Id: Idb6a3693ad356227d46d0b28fb4c3a5db62b4ac4
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: Ie290c07c07c13134a57f328e9ae876b2af6974db
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: I25f11e80747863f797d146980d8ee0e605acb6e5
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>