Loader: Fix comparison of repre name

[iLLiCiTiT]

Brief description

Fix the comparison of representation names to match stored representation names in found combinations.

Testing notes:

1. Make sure you have 2 or more subsets with representation that has at least one capital character in name
   • e.g. "someRepre"
2. Open loader in DCC where you have available Loader plugin that can load the representation
3. Select group of subsets in loader view a right-click to shown context menu
4. The loader should be visible there

[ynbot]

Task linked: OP-4054 Loader: mutliselection loading not working on matching representation