turn SfxPickList singleton a member of SfxApplication

SfxPickList listens to the SfxApplication so it can
be made a member of that, and drop the singleton, which
is causing trouble like...

 #0  0x00007ffff613ad7d in ImplDbgTestSolarMutex() () at /libreoffice/symbols/vcl/source/app/dbggui.cxx:47
 #1  0x00007ffff6ee86e1 in SfxBroadcaster::RemoveListener(SfxListener&) (this=0x5555565d0380, rListener=...) at /libreoffice/symbols/svl/source/notify/SfxBroadcaster.cxx:126
 #2  0x00007ffff6eea993 in SfxListener::~SfxListener() (this=0x555556622620, __in_chrg=<optimized out>) at /libreoffice/symbols/svl/source/notify/lstner.cxx:66
 #3  0x00007ffff7207b45 in SfxPickListImpl::~SfxPickListImpl() (this=0x555556622620, __in_chrg=<optimized out>) at /libreoffice/symbols/sfx2/source/appl/sfxpicklist.cxx:84
 #4  0x00007ffff7207b45 in SfxPickListImpl::~SfxPickListImpl() (this=0x555556622620, __in_chrg=<optimized out>) at /libreoffice/symbols/sfx2/source/appl/sfxpicklist.cxx:84
 #5  0x00007ffff7206aa5 in std::default_delete<SfxPickListImpl>::operator()(SfxPickListImpl*) const (this=<optimized out>, __ptr=<optimized out>) at /usr/include/c++/7/bits/unique_ptr.h:78
 #6  0x00007ffff7206aa5 in std::unique_ptr<SfxPickListImpl, std::default_delete<SfxPickListImpl> >::reset(SfxPickListImpl*) (__p=<optimized out>, this=0x7ffff76775a8 <SfxPickList::ensure()::aUniqueInstance>) at /usr/include/c++/7/bits/unique_ptr.h:376
 #7  0x00007ffff7206aa5 in SfxPickList::~SfxPickList() (this=0x7ffff76775a8 <SfxPickList::ensure()::aUniqueInstance>, __in_chrg=<optimized out>) at /libreoffice/symbols/sfx2/source/appl/sfxpicklist.cxx:188
 #8  0x00007ffff44dc041 in __run_exit_handlers (status=0, listp=0x7ffff4884718 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true, run_dtors=run_dtors@entry=true) at exit.c:108
 #9  0x00007ffff44dc13a in __GI_exit (status=<optimized out>) at exit.c:139
 #10 0x00007ffff44bab9e in __libc_start_main (main=0x555555557880 <main(int, char**)>, argc=10, argv=0x7fffffffdde8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffddd8) at ../csu/libc-start.c:344
 #11 0x00005555555578da in _start ()

Change-Id: Ic781f3eb065fef14da1f10a56246b9b7068e1529
c781f3eb065fef14da1f10a56246b9b7068e1529
Reviewed-on: https://gerrit.libreoffice.org/58494
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sfx2/source/appl/appdata.cxx

@@ -30,6 +30,7 @@
 #include <appdata.hxx>
 #include <sfx2/dispatch.hxx>
 #include <sfx2/event.hxx>
+#include <sfxpicklist.hxx>
 #include <sfxtypes.hxx>
 #include <sfx2/doctempl.hxx>
 #include <arrdecl.hxx>

sfx2/source/appl/appinit.cxx

@@ -218,7 +218,7 @@ void SfxApplication::Initialize_Impl()
         SolarMutexGuard aGuard;
         //ensure instantiation of listener that manages the internal recently-used
         //list
-        SfxPickList::ensure();
+        pImpl->mxAppPickList.reset(new SfxPickList(*this));
     }
 
     DBG_ASSERT( !pImpl->pAppDispat, "AppDispatcher already exists" );

sfx2/source/appl/sfxpicklist.cxx

@@ -78,7 +78,7 @@ class SfxPickListImpl : public SfxListener
     static void         AddDocumentToPickList( SfxObjectShell* pDocShell );
 
 public:
-    SfxPickListImpl();
+    SfxPickListImpl(SfxApplication& rApp);
     virtual void Notify( SfxBroadcaster& rBC, const SfxHint& rHint ) override;
 };
 
@@ -161,25 +161,18 @@ void SfxPickListImpl::AddDocumentToPickList( SfxObjectShell* pDocSh )
                                                                  pFilter ? pFilter->GetServiceName() : OUString() );
 }
 
-SfxPickList::SfxPickList()
-    : mxImpl(new SfxPickListImpl())
+SfxPickList::SfxPickList(SfxApplication& rApp)
+    : mxImpl(new SfxPickListImpl(rApp))
 {
 }
 
 SfxPickList::~SfxPickList()
 {
-    std::unique_ptr<SolarMutexGuard> xGuard(comphelper::SolarMutex::get() ? new SolarMutexGuard : nullptr);
-    mxImpl.reset();
 }
 
-void SfxPickList::ensure()
+SfxPickListImpl::SfxPickListImpl(SfxApplication& rApp)
 {
-    static SfxPickList aUniqueInstance;
-}
-
-SfxPickListImpl::SfxPickListImpl()
-{
-    StartListening( *SfxGetpApp() );
+    StartListening(rApp);
 }
 
 void SfxPickListImpl::Notify( SfxBroadcaster&, const SfxHint& rHint )

sfx2/source/inc/appdata.hxx

@@ -35,6 +35,7 @@
 #include <vector>
 
 class SfxApplication;
+class SfxPickList;
 class SfxProgress;
 class SfxDdeDocTopic_Impl;
 class DdeService;
@@ -88,6 +89,7 @@ public:
     SfxErrorHandler *m_pSbxErrorHdl;
 #endif
     rtl::Reference<SfxStatusDispatcher> mxAppDispatch;
+    std::unique_ptr<SfxPickList>        mxAppPickList;
     SfxDocumentTemplates*               pTemplates;
 
     // global pointers

sfx2/source/inc/sfxpicklist.hxx

@@ -20,14 +20,11 @@
 #ifndef INCLUDED_SFX2_SOURCE_INC_SFXPICKLIST_HXX
 #define INCLUDED_SFX2_SOURCE_INC_SFXPICKLIST_HXX
 
-#include <vcl/menu.hxx>
-#include <svl/lstner.hxx>
-#include <com/sun/star/util/XStringWidth.hpp>
-
-#include <vector>
+#include <memory>
 
 #define PICKLIST_MAXSIZE  100
 
+class SfxApplication;
 class SfxPickListImpl;
 
 class SfxPickList
@@ -35,9 +32,7 @@ class SfxPickList
 private:
     std::unique_ptr<SfxPickListImpl> mxImpl;
 public:
-    SfxPickList();
-    /// Ensure instantiation of listener that manages the internal recently-used list
-    static void ensure();
+    SfxPickList(SfxApplication& rApp);
     ~SfxPickList();
 };