Save As Dialog quits with "Cannot determine File Type"
Fedora Linux ver. 28
When using the "Save as…" Dialog to save a file, and if the "File name:" Field doesn't contain the File extension,
clicking "Save" closes the Dialog with a Message Box stating: "Cannot determine File Type".
The entered data gets lost. The file is not saved.
Since the File Type is determined by the Drop-down Menu "Files of type", this is unnecessary.
a) the dialog remains open, after the message appears (no data loss)
b) the dialog ignores the absence of the File extension and saves anyway
c) the dialog automatically appends the file extension on clicking save or selecting a different field, if none is present. Respectively it changes the "Files of type" field to the typed file extension, if one is present.