1.5.4 Better SQL Server support; bug fixes

Written for SOFA Statistics by Grant Paton-Simpson on 2021-01-14

Better SQL Server support; more bugs fixes and improvements

Support more versions of MS SQL Server by switching to pyodbc library
Standardise multiline checkboxes
Cope with different versions of openpyxl without forcing Linux users to pin the version (which may not be in their distro)
Fix width of main form help text in Windows
Fix chart display bug in Windows by forcing IE11 emulation (vs IE7)
Fix spreadsheet export bug - use column letter rather than name
Fix bug when exporting CSV with label columns
Fix sorting in Data List reports
Fix bug where renaming a project left the original intact
Fix bug preventing decimal point settings being honoured in Summary report tables and Data List reports

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