This is the patch as supplied, which needs work and as of yet doesn't
compile on non-unix. Fixes pending. -- jpd

This reverts commit 714ef56a.

By popular demand.

If we receive a currentChanged, and currentView ain't set, we might crash in
handleExpansion

Crashes have happened at
StandardPLPanel::handleExpansion (this=<value optimized out>, index=@0x406b56a0) at
components/playlist/standardpanel.cpp

Spotted by jpeg.

And adapt the actions in consequences

Returns a direct pointer to the extensions_manager_t