Add Column Format radiogroup to toggle the headers on the Datatable

[yogat3ch]

Rationale:

Surveys often have considerable post-processing logic requiring data-munging and computation from additional data science tooling. Using the question titles as headers can make munging cumbersome when attempting to identify columns. The ability to select whether to use the Question Title or the Question Name for the header can make munging easier.

Implementation:

• Add a toggle in the survey export settings to choose between using Question Titles or Question Names as headers.
• Default to using Question Titles for backward compatibility.
• Re-draw the datatable to reflect the selected header option when toggled.

Known Issues:

Redrawing the datatable causes the modal typically shown when "Show in Survey" is pressed, to pop up. I'm unsure why this is happening, but it does not affect functionality. If anyone has insights on preventing this, please share or ask to modify my PR!