Min/max size for auto-sized tiles

[diomidov]

If you fill a row/column with auto-sized tiles, the entire row/column vanishes.It would be nice if the mapping file could specify a minimum size of the tiles to avoid this issue (and maybe also a maximum size for symmetry?)

The syntax could look like something this

<symbol width='10...'>
<symbol width='10...20'>
<symbol width='...20'>
<symbol width='10...10'> = <symbol width='10'>
<symbol width='...'> = <symbol width='auto'>

Alternative notion from @edemaine, more like SVG/HTML:

<symbol width="auto" style="min-width: 10px">
<symbol width="auto" style="min-width: 10px; max-width: 20px">
<symbol width="auto" style="max-width: 20px">