v5.15.26

• fixes #519 - add support for pinned message indicator and jump to pinned message (telegram and whatsapp)
• fixes #520 - add support for pin/unpin of selected message (telegram)
• fixes #516 - improve view once handling
• fixes #502 - improve mime type detection
• fix make.sh install to skip sudo if already root user (#508)
• add ayu-dark and gruvbox-dark-hard themes (#507)
• skip installing themes and update themes doc
• add support for message edited indicator
• improve handling of custom message deletion (message_delete modes 2 and 3)
• restrict custom message_delete to whatsapp and signal
• fix telegram local reflecting removal of own reaction when being the last reaction
• fix whatsapp sending audio messages
• add protocol suffix in desktop notification name
• add protocol/profile level directory locking
• fix signal abi mismatch after libsignal ref bump
• signal robustness fixes
• whatsapp robustness fixes
• update signalmeow to 20260416 from mautrix/signal@1f45d1a
• update whatsmeow to 20260416 from tulir/whatsmeow@3ff20cd
• update tdlib to 1.8.63 from tdlib/td@f06b0ba