Code-style, stability improvements

What's inside

• Code style improvements
• Bug fixes

Feature breakdown

Code style improvements

Added four major ESLint rules:

• react/jsx-no-useless-fragment to prevent useless fragment definition
• curly - to make sure all ifs are using {}
• brace-style - to ensure all block statement curly brackets are on new lines
• react/sort-comp - patch after react ESLint plugin update which forced to reorder some rules

Bug fixes

• MenuOverlay overflow (on layer above first)
• Fixed category bread-crumbs sorting
• Brought missing url-rewrites back
• Search-Overlay stability improvements (not final)
• Shared transition z-index fix
• Italian translations