HeliBoard 2.2-beta1

Note from maintainer: I will be away for the next 3 weeks, and only rarely have time for issues, PRs and development.

Changes since 2.1:

• make arrow keys on keyboard repeatable, by @devycarol (#932)
• more cursor toolbar keys (page up/down(/start/end, word left/right), by @devycarol (#933)
• add paste key, by @devycarol (#945)
• add clipboard suggestion for recently copied text, by @codokie (#647)
• improve key swipe behavior, by @devycarol (#919)
• add ability for saving / exporting custom themes
• adjust language dependent popup keys, partially by @clmbmb and @glemco (#659, #921, #824)
• add space swipe setting to toggle numpad, by @devycarol (#950)
• de-select text on pressing select keys again, by @devycarol (#973)
• tune some colors in settings for Android 12+, by @BlackyHawky (#975)
• add setting when to switch to main view after edding emoji, clip or symbol (#546)
• minor fixes and improvements (#912, #952, ...)