Unique Value Symology: no default/else case classification

[mwtoews]

Stylizing a layer using unique value classification is very useful. However, if the underling data in the classification field is modified after classifying in QGIS, then new classifications are not displayed. This omission can often be critical to the end user.

Most GIS software have a default style for unique classifications. This is analogous to the default or else part of a case or switch programming statement. It would be very useful in the Symbology tab of Layer Properties to have a checkbox for inclusion of a default style, and the ability to modify the style (as with the other classifications).

[jef]

fixed in r10986