Followup new breeze frameless style

• Investigate RTL
• Investigate bottom tabbar
• Merge support in frameworks
  • KMultiTabBar frameworks/kwidgetsaddons!208 (merged)
• Merge support for apps
  • Okular graphics/okular!812
  • Dolphin system/dolphin!600 (merged)
  • Kdevelop !342 (comment 800655)
  • Kate utilities/kate!1286 (merged)
  • KMail pim/messagelib@bfafeac8
  • ...