#78 transposing heat map

[Lina Humbeck]

According to the screen resolution and molecule/property ratio it is maybe sometimes advantageous to be able to transpose the heat map. Another option would be to set the minimal column size to a bigger value and provide a correlating scroll bar. The user can of course zoom in horizontally and have the same result, but I like to see the cell borders and for me this would be nice to have as a standard layout setting.