tdf#116384 only drag hyperlink if user's not currently setting the selection

which is what writer does for normal text.

Under gtk its common on selecting by dragging the mouse over a hyperlink
for one or two letters of the hyperlink to get selected before that
selection then gets dragged as dnd.

Under gen StartDragWidth is 2 by default so the drag kicks in before
enough text has been selected for writer to select anything, but under
gtk gtk-dnd-drag-threshold is used for StartDragWidth and that is 8 by
default making it easy to select one or two characters before the
gesture is recognized as a possible drag.

it seems sane to do the same as for normal text and not dnd if the user
is still using the mouse to set a selection

Change-Id: I971d429acaf8a5a656c5ce58f52632979b94e40a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/114726
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>
diff --git a/sw/source/uibase/docvw/edtdd.cxx b/sw/source/uibase/docvw/edtdd.cxx
index 31594da..a9d8037 100644
--- a/sw/source/uibase/docvw/edtdd.cxx
+++ b/sw/source/uibase/docvw/edtdd.cxx
@@ -83,7 +83,8 @@ void SwEditWin::StartDrag( sal_Int8 /*nAction*/, const Point& rPosPixel )
    bool bStart = false, bDelSelect = false;
    SdrObject *pObj = nullptr;
    Point aDocPos( PixelToLogic( rPosPixel ) );
    if ( !rSh.IsInSelect() && rSh.TestCurrPam( aDocPos, true))
    const bool bInSelect = rSh.IsInSelect();
    if (!bInSelect && rSh.TestCurrPam(aDocPos, true))
        //We are not selecting and aren't at a selection
        bStart = true;
    else if ( !g_bFrameDrag && rSh.IsSelFrameMode() &&
@@ -109,7 +110,7 @@ void SwEditWin::StartDrag( sal_Int8 /*nAction*/, const Point& rPosPixel )
        else
            rSh.UnlockPaint();
    }
    else
    else if (!bInSelect)// tdf#116384 only drag hyperlink if user's not currently setting the selection
    {
        SwContentAtPos aSwContentAtPos( IsAttrAtPos::InetAttr );
        bStart = rSh.GetContentAtPos( aDocPos,