Can't re-read in CRTF files that have regions with spaces in their names

[jehibbard]

Describe the bug
CARTA v3.0 won't read in CRTF file when region names have spaces in them

To Reproduce
Steps to reproduce the behavior:

1. Open an image
2. Create a region
3. In the region manager, give it a name with spaces in it (e.g. Disk Red Edge, Disk Blue Edge)
4. Export the region as a CRTF file
5. Delete the regions
6. Read the CRTF file that you previously saved
7. CARTA will pop-up a red error box about string syntax error
8. Change the names to have no spaces and resave and you'll be able to load it properly

Expected behavior
I expect it to read in and display the saved regions

Screenshots or videos
Attached is a screenshot of reading in the region in v3.0-beta3 (on the left) and trying to read it in on my new installation of v3.0

Platform info (please complete the following information):

• OS [e.g. macOS Monterey]: macOS 12.5.1, MBP M1 Pro
• Browser [e.g. chrome, safari, electron app]: Safari & Chrome
• Browser version [e.g. 22]: Safari 15.6.1, Chrome v104.0.5112.101
• Backend branch [e.g. dev, v3b2 release]: v3.0 release (installed via brew install cartavis/tap/carta)
• Frontend branch [e.g. dev, v3b2 release]: v3.0 release (installed via brew install cartavis/tap/carta

Additional context
Add any other context about the problem here.
I did not have this problem in v3.0-beta3 (and can actually import the crtf file created in v3.0 and see them in v3-beta)
I quit CARTA and started up a new session and went through the steps above and still got the same result.
I used a different image, repeated the steps, and got the same result