2026.6.18.616 - Various bugfixes, better deltaTime calculation for input — Resonite Steam update #1113485

Hello everyone! Got a small maintenance build for you with a bunch of bugfixes! Compatible with current! Tweaks: - Switched to more accurate method for computing delta time for the input system and other core engine operations Locale: - Merged English locale improvements by @noblefurlyfe Fixes: - Patch the `sendFriendRequest` command on the Headless Server Software to avoid needing to already be friends with the target user (reported by DrSciCortex in #5683, fixed by @j4.lc) - Fixed API issues causing 500 errors with some cloud variable definitions (fixed by @probableprime) -- Discovered with cool new metrics stuff ProbablePrime has been working on. - Fixed some PromoCode metrics having mixed case outputs leading to duplicate entries (found & fixed internally by @probableprime) - Fixed regression in viewport setting being broken on cameras (reported by @code807, issue #6722, fix contribu...