Determines the maximum width for the prefix column when it is automatically optimized.
The lower this value is the more likely it is that clipping will occur with the prefix labels of drawers.
The higher this value is the more likely it is that your controls will end up with little space available to them when drawers with really long prefix labels are shown inside the inspector view.
The default value for this preference item is 0.55.
Note: You can always manually optimize the prefix column width by double-clicking the prefix column resize control, in which case this preference item will not be used for capping the resulting prefix column width.