tdf#158404 Start Center: remove ability to do multiselections

in Recent Documents and Templates views using Shift+arrow keys as
no actions can be executed for multiple selected files.

Multiselection still works as normal in Manage Templates dialog.

Change-Id: I03b9e54abb7772881139763a0c97f36637d01f85
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/160003
Tested-by: Jenkins
Tested-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>
Reviewed-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org>
diff --git a/include/sfx2/thumbnailview.hxx b/include/sfx2/thumbnailview.hxx
index 655aa3b..54e8440 100644
--- a/include/sfx2/thumbnailview.hxx
+++ b/include/sfx2/thumbnailview.hxx
@@ -309,6 +309,7 @@ protected:
    bool mbShowTooltips : 1;
    bool mbDrawMnemonics : 1;
    bool mbSelectOnFocus : 1;
    bool mbAllowMultiSelection : 1;
    Color maFillColor;              ///< Background color of the thumbnail view widget.
    Color maTextColor;              ///< Text color.
    Color maHighlightColor;         ///< Color of the highlight (background) of the hovered item.
diff --git a/sfx2/source/control/recentdocsview.cxx b/sfx2/source/control/recentdocsview.cxx
index 6df5347..f6ea127 100644
--- a/sfx2/source/control/recentdocsview.cxx
+++ b/sfx2/source/control/recentdocsview.cxx
@@ -68,6 +68,7 @@ RecentDocsView::RecentDocsView(std::unique_ptr<weld::ScrolledWindow> xWindow, st
    , mpLoadRecentFile(nullptr)
    , m_nExecuteHdlId(nullptr)
{
    mbAllowMultiSelection = false;
    AbsoluteScreenPixelRectangle aScreen = Application::GetScreenPosSizePixel(Application::GetDisplayBuiltInScreen());
    mnItemMaxSize = std::min(aScreen.GetWidth(),aScreen.GetHeight()) > 800 ? 256 : 192;

diff --git a/sfx2/source/control/templatedefaultview.cxx b/sfx2/source/control/templatedefaultview.cxx
index 909545e4..eef46f1 100644
--- a/sfx2/source/control/templatedefaultview.cxx
+++ b/sfx2/source/control/templatedefaultview.cxx
@@ -25,6 +25,7 @@ TemplateDefaultView::TemplateDefaultView(std::unique_ptr<weld::ScrolledWindow> x
                                         std::unique_ptr<weld::Menu> xMenu)
    : TemplateLocalView(std::move(xWindow), std::move(xMenu))
{
    mbAllowMultiSelection = false;
    AbsoluteScreenPixelRectangle aScreen = Application::GetScreenPosSizePixel(Application::GetDisplayBuiltInScreen());
    tools::Long nItemMaxSize = std::min(aScreen.GetWidth(),aScreen.GetHeight()) > 800 ? 256 : 192;
    ThumbnailView::setItemDimensions( nItemMaxSize, nItemMaxSize, gnTextHeight, gnItemPadding );
diff --git a/sfx2/source/control/thumbnailview.cxx b/sfx2/source/control/thumbnailview.cxx
index abb9f97..1ae4701 100644
--- a/sfx2/source/control/thumbnailview.cxx
+++ b/sfx2/source/control/thumbnailview.cxx
@@ -246,6 +246,7 @@ void ThumbnailView::ImplInit()
    mbHasVisibleItems = false;
    mbShowTooltips = false;
    mbDrawMnemonics = false;
    mbAllowMultiSelection = true;
    maFilterFunc = ViewFilterAll();

    const StyleSettings& rSettings = Application::GetSettings().GetStyleSettings();
@@ -681,7 +682,7 @@ bool ThumbnailView::KeyInput( const KeyEvent& rKEvt )

    if ( pNext )
    {
        if (aKeyCode.IsShift() && bValidRange)
        if (aKeyCode.IsShift() && bValidRange && mbAllowMultiSelection)
        {
            std::pair<size_t,size_t> aRange;
            size_t nSelPos = mpStartSelRange - mFilteredItemList.begin();