Changes:

• Ask for interpretation of comma (when comma is not the default decimal separator)
• Restore editing of all right-hand side buttons
• Use icon for "AC" button, and no icon for "DEL" button
• Automatically set "Use comma as decimal separator" and "Ignore comma/dots in numbers" when local digit grouping is selected
• Improvements for insert function dialog in RPN mode
• Support input of base in log() function before parenthesis, e.g. "log20(400)" (equivalent to "log(400, 20)")
• support input of exponent before argument of trigonometric function (e.g. "sin²(x)")
• Support input of functions with more than one argument using RPN syntax
• Add new binary prefixes (robi, quebi), and enable use of recently added SI prefixes in output by default
• Micron unit
• Support "to 1/n" as alternative to "to fraction"
• Data set translation fixes
• Return exact integers in more case in log() function
• Fix segfault with text argument containing potential text returning function, or variable containing text value
• Fix segfault during calculation of (in)equality with root() function with insufficient number of arguments
• Fix segfault during output of both approximate and exact logical OR value without (in)equality
• Fix qError() function
• Minor bug fixes and feature enhancements