Description:
When loading files in „.csv-text-format“ into the calc-application, unwanted „ ' “-Characters (single quotation marks) are prepositioned to „date-fields“ by the program. These become only visible to the user in the program, if the format of the „date-field“ is changed. Only after extinguishing of theese unwanted Characters, the „date-field“ is shown properly formatted in the way, the user has selected, for instance yyyy-mm-dd.

Steps to Reproduce:
1. Import an example-file containing date fields in csv-format into spreadsheet application (calc)
2. Mark some date-fields to change their format
3. Change the format of date, for instance from dd.mm.yyyy to yyyy-mm-dd
4. See, that the change has no effect
5. See the selected field in the edit-box: there is a quotation mark at the beginning of the field
6. Remove this quotation mark character
7. See, that now the field is formatted in the way, the user wanted

Actual Results:
the program inserts unwanted quotation-mark-characters, which prevent the fields to bee formatted correctly

Expected Results:
the program should not do this, as it did in very old versions, for instance 5.0.5.2


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Version: 6.1.6.3 (x64)
Build-ID: 5896ab1714085361c45cf540f76f60673dd96a72
CPU-Threads: 16; BS: Windows 10.0; UI-Render: Standard; 
Gebietsschema: de-CH (de_CH); Calc: group threaded