Description:
When choosing a file to open, LibreOffice uses a heuristic to guess the file type, and choose the correct program. In most cases, it does a pretty good job of deciding which program (Calc, Writer, etc.) to use to read the file.

However, there are cases where the heuristic fails, and the wrong program is opened. For instance, IIF is a common format of file for data exchange between accounting software (particularly QuickBooks). It is a grid-based, tab-delimited file format that is best edited with a spreadsheet application, such as Calc. However, trying to open an IIF file in Calc results in the Writer application opening the file instead.

Changing the file type to "Text CSV" in the open dialog does cause Calc to behave properly. However, it also has the side effect of hiding any file that doesn't have a CSV extension, making it impossible to choose the file. You either have to remember the name and type it in, or remember to choose the file before choosing the file type. Also note that LibreOffice on certain Linux installations don't give you the option of typing the name at all.

The above behavior is correct in most situations, and should remain the default. But there needs to be an easy way to override the automatic file type detection, separate from the file extension filter, for edge cases such as this.

Steps to Reproduce:
1. Open Calc.
2. Choose File/Open.
3. Pick an IIF file.

Actual Results:
The file opens in Writer, with no option to change it.

Expected Results:
There should be some *easy* way to force the file to open in Calc, using the Text CSV import options.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Version: 6.1.6.3
Build ID: 6.1.6.3-1.fc29
CPU threads: 4; OS: Linux 5.2; UI render: default; VCL: gtk3; 
Locale: en-US (en_US.UTF-8); Calc: group threaded

Version: 6.1.3.2
Build ID: 86daf60bf00efa86ad547e59e09d6bb77c699acb
CPU threads: 1; OS: Windows 6.1; UI render: default; 
Locale: en-US (en_US); Calc: group threaded