HeliBoard 2.3

Changes since 2.3-beta1:

• revert fix for #994 due to it introducing other issues (#1281, #1268)
• fix broken width of emoji & clipboard bottom rows in one-handed mode
• fix system bar handling in Android 15 (#1186)
• add missing letter in Catalan layout (#1176)
• prepare for adding unicode 15.1 and 16.0 emojis