TODO:

• SpreadsheetView: implement getBigInt() using QLineEdit with QLongLongValidator inherit from QValidator (see https://stackoverflow.com/questions/19865535/qt-qinputdialog-how-to-validate)
• implement the interruption of running calculations in Maxima, borrow the code from wxMaxima for this

DONE:

• add KUserFeedback on Windows and Mac (Stefan)
• Implement color maps (https://www.kennethmoreland.com/color-maps/)
• support multiple data ranges in plot (T13016)
• support 1/x axis scale

Links:

• TODO list: T11524
• Windows port: T3118, T11868, T11669
• Mac port: T3196