tdf#91944 Fix inc/dec indent buttons in impress

Regression from ed6b7d97.
These buttons are implemented inside the sidebar, so just
changing command names in the ui file won't work.
Also, following the decision to use indent buttons across all
modules, there is no need for 2 separate toolboxes anymore.

Change-Id: Id9af0cd10fd0517be86b9793c187cd6508029732
Reviewed-on: https://gerrit.libreoffice.org/16199Reviewed-by: Maxim Monastirsky <momonasmon@gmail.com>
Tested-by: Maxim Monastirsky <momonasmon@gmail.com>

svx/source/sidebar/paragraph/ParaPropertyPanel.hxx

@@ -83,7 +83,6 @@ private:
     VclPtr<SvxRelativeField>   mpTopDist;
     VclPtr<SvxRelativeField>   mpBottomDist;
     VclPtr<ToolBox>            mpTbxIndent_IncDec;
-    VclPtr<ToolBox>            mpTbxProDemote;
     VclPtr<SvxRelativeField>   mpLeftIndent;
     VclPtr<SvxRelativeField>   mpRightIndent;
     VclPtr<SvxRelativeField>   mpFLineIndent;
@@ -94,8 +93,6 @@ private:
 
     // Data Member
     long                maTxtLeft;
-    bool                    mbOutLineLeft;
-    bool                    mbOutLineRight;
     long                    maUpper;
     long                    maLower;
 
@@ -106,8 +103,6 @@ private:
     // Control Items
     ::sfx2::sidebar::ControllerItem  maLRSpaceControl;
     ::sfx2::sidebar::ControllerItem  maULSpaceControl;
-    ::sfx2::sidebar::ControllerItem  maOutLineLeftControl;
-    ::sfx2::sidebar::ControllerItem  maOutLineRightControl;
     ::sfx2::sidebar::ControllerItem  maDecIndentControl;
     ::sfx2::sidebar::ControllerItem  maIncIndentControl;
     ::sfx2::sidebar::ControllerItem  m_aMetricCtl;
@@ -119,12 +114,10 @@ private:
 
     DECL_LINK(ModifyIndentHdl_Impl, void*);
     DECL_LINK_TYPED(ClickIndent_IncDec_Hdl_Impl, ToolBox*, void);
-    DECL_LINK_TYPED(ClickProDemote_Hdl_Impl, ToolBox*, void);
     DECL_LINK(ULSpaceHdl_Impl, void*);
 
     void StateChangedIndentImpl( sal_uInt16 nSID, SfxItemState eState, const SfxPoolItem* pState );
     void StateChangedULImpl( sal_uInt16 nSID, SfxItemState eState, const SfxPoolItem* pState );
-    void StateChangeOutLineImpl( sal_uInt16 nSID, SfxItemState eState, const SfxPoolItem* pState );
     void StateChangeIncDecImpl( sal_uInt16 nSID, SfxItemState eState, const SfxPoolItem* pState );
 
     void initial();