versioncontrol: fix use-after-free of the current plugin

searchPlugin returns one of the observer-owned m_plugins, so m_currentPlugin
always aliases an entry in that list. Deleting m_currentPlugin in setModel
freed that object while leaving a dangling pointer in m_plugins, which the
next searchPlugin or actions call would dereference. setModel(nullptr) runs
on every directory change, so this was reachable when leaving a versioned
directory.

Make the observer the real owner: parent the plugins to it so QObject
deletes them, stop deleting the shared plugin in setModel (just clear the
current selection), and drop the matching delete in the destructor.

0 files changed, 0 insertions, 0 deletions