Introduce RiaZScaleTools as a single source for the Z-scale factor list, merging the predefined factors with custom values entered during the session. The toolbar combo box, the property editor combo box and the Ctrl+Shift+Up/Down shortcuts all use this shared sorted list.
The toolbar combo box previously appended custom values at the end, producing an unsorted, ever-growing list, and the shortcuts stepped through the predefined factors only, skipping custom values visible in the list.
Make the Z-scale combo boxes in the toolbar and property editor editable, so any positive scale value can be entered as text. Invalid input is rejected and the previous value is restored.
Add keyboard shortcuts Ctrl+Shift+Up and Ctrl+Shift+Down to step the Z-scale of the active view through the predefined scale values.
Kristian Bendiksen
Magne Sjaastad