Fixed positional issue for stash after they added folders

• Added option to set a tab as "in a folder" because the tab is lower on the screen
• Only show tabs that are supported (at the moment Normal and Premium)
• Change font color of tab to be readable no matter the background color.
• Add some hardcoded gem colors like Splitting Steel where it's a Dex gem but the Str requirement is higher.
• Made settings save by tab ID rather than Index so that if you rearrange your tabs it will keep the settings where they should be.