Add a new public method do dynamicaly resize the table
fix wrong size of left part when resizing (missing offset for scrollbar)
fix wrong size calculation in case  of very small horizontal scroll (missing hight offset for left part)
better resize calculation for scrollbar offsets
fix bad celle height/widhts extraction
protect destroy function to avoid error if launched on a non tinytbl element
add conditions to not compute hidden cells (only if we not use the renderer mode)