Fix to error reporting
Changed column names in R to be base64 encoded

R does not support spaces or special characters in data frame column
names. Base64 recodes column names without these other characters.
Removed context menu from web view + tidy up
Can now view data when an analysis dialog is open

… by resizing the window. This is a bit nice.
File -> Open now remembers where you last opened
Exit button now exits
Implemented the 'Close' button

A surprising amount of work
Updates to Crosstabs
Adjustments to Splitter scaling on window resize
Changed how radio buttons are mapped to options

Radio buttons are now mapped by index, rather than by name. The index
of a radio button is determined by first sorting them by objectName(),
and then assigning them 0 … n
It is recommended that names be prefixed with _1, _2, _3, etc. to
determine their sort order and hence their index.
Updates to BoundComboBox and SEM analysis
Updated Tabs, added Options

SEM is now enabled in settings
Fix to TabBar background