Settings screen

[fichek]

settings.mp4

• Resolves Settings Panel #28 by adding a settings screen
• Added an auto-hiding floating settings button on the main screen to show the settings
• Added several new strings so localization update is needed, see Localization update #61
• Added closer color variants to colors.xml and updated themes xml files with new colors, removed unused ones
• Removed the splash screen background as it was causing issues with the settings screen, need to fix that, see Fix the splash screen #62
• Removed hiding/showing watermark on tap since that is now used to hide/show settings button, instead you can now permanently hide/show the watermark from settings

[SanielDous]

When the Tutorial is merged we should add the link from the settings to the TutorialActivity so user can display it again (if they want to)

[fichek]

When the Tutorial is merged we should add the link from the settings to the TutorialActivity so user can display it again (if they want to)

Absolutely, will add any new stuff in separate PRs, or you can add it yourself in your PR if this is merged before.