Conty(android): v1.8.0 Build 27

Features

• options to control app with volume buttons (c9a560d)

Bug fixes

• missing thumbnail for some packs (3dbded2)
• improved inverse image colors feature (d81f1ef)
• improved eink style (d70b014)
• prevent "double" taps on main list (1b69a9e)
• selection error after deleting some packs (e96ff83)
• better structure for settings (856fcb3)