Can't swap dimensions for Bio-Formats using optional args

[petebankhead]

Bug report

Describe the bug
It should be possible to swap dimensions when reading an image in Bio-Formats using option args, e.g. --dims XYTCZ, since #725

However, it doesn't work because of some confusion between the option name: --dims (for parsing) and --swap (serialized in the project).

Consequently, to see the effect in a project you need to open the JSON in a text editor and do a find and replace for all instances of --swap to become --dims.

To Reproduce
Steps to reproduce the behavior:

1. Create a project
2. Import a multidimensional image using Bio-Formats, with --dims XYTCZ or similar
3. Open the image; the dimensions aren't swapped
4. Check the project.qpproj file and look for instances of --dims... it won't be there, rather --swap will be instead.

Expected behavior
--dims should be stored in the project, when it is set as an optional arg.

Desktop (please complete the following information):

• OS: All
• QuPath Version: 0.3.2

Additional context
This was first noticed when investigating https://forum.image.sc/t/qupath-imagej-codex-swap-z-and-marker-channels/58565/15

Fixing this line might be all it takes:
https://github.com/qupath/qupath/blob/v0.3.2/qupath-extension-bioformats/src/main/java/qupath/lib/images/servers/bioformats/BioFormatsImageServer.java#L1609