Description of problem:
When I use "Share disks with other operating systems", there's a "Reclaim space" dialog. I can use the Resize icon to resize a partition. However, the slider doesn't work correctly for certain languages, e.g. Czech. No numbers are shown, and when I click into the text field, then the slider breaks completely, unless I reset it to 100% (I think).

I assume this might be related to whether a decimal point (English) or comma (Czech and many other languages) is used?

Version-Release number of selected component (if applicable):
anaconda-live-43.44-1.fc43.noarch
anaconda-webui-53-1.fc43.noarch

How reproducible:
always

Steps to Reproduce:
1. pick Czech as a language
2. go to "Sdílet disk s jinými operačními systémy" ("Share disks with other operating systems")
3. use the resize icon to resize a partition
4. try to use the slider