TreeView: support selection by shift+arrows/home/end when showCheckBoxesMode='none'#31279

pharret31 merged 6 commits into

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pharret31:25_2_1052-treeview-support-selection-by-shiftarrowshomeend-when-selectionmodemultiple-but-showcheckboxesmodenonepharret31/DevExtreme:25_2_1052-treeview-support-selection-by-shiftarrowshomeend-when-selectionmodemultiple-but-showcheckboxesmodenoneCopy head branch name to clipboard