Fixed issue 12697: SPSS Export - responses truncated for incomplete answers (#815)

Fixed issue 12697: SPSS Export - responses truncated for incomplete answers
Dev: force_refresh before exporting (like export by plugins)
Dev: unsure it fix THIS issue, but clearly : force_refresh seem needed
Fixed issue 12734: SPSS : exporting complete or uncomplete make different syntax
Dev: get the real size for string/text in the DB
Dev: Must review numeric (N/K) part ?
Dev: What for float ?
Dev: Fix invalid var without minus
Dev: MAX for max …
Dev: Fix export Array text and multi text as string (get size)
Dev: default is to export as string
Dev: Fix other/comment issue …
Dev: Fix badly set array number as dropdown for text input
Dev: fix controller part
Dev: Fix width of numeric is total width
Dev: readding $length_vallabel = 120;
Dev: constant for all SPSS version ?
Dev: Fixed issue other and comment must be string