normal mode: Importing only regular/basic fields from source file
advanced mode: Importing any related fields from source file(i.e. if detected pattern in header like '<relational_fieldname>/<fname>')
- Rename following checkbox "Show all fields for completion (advanced)" in "Show fields of relation fields (advanced)"
- If the import file contains a column with a field of a relation field, show the column label in the preview, even if "Show fields of relation fields (advanced)" is not checked > to make it less confusing when importing advanced files (e.g. products with attributes)
After this commit,
- chinese custom date are supported
- Possibility to specify the custom datetime format and not only dateformat.
Withtout it, impossible to import a date column and datetime column at
sametime with custom format.
- Add test to check import date with custom format
- Fix translation where error messages was in the source.
This commit fixes#13783 and closes#13803
Courtesy of @odony for the review ;)