Ontime v1.9.6

Several small improvements in UX and bug fixes

What's Changed

• fix: prevent false error on form submit by @cpvalente in #230
• feat: OSC feedback by @cpvalente in #236
• fix: event card styles are overridable by @cpvalente in #240
• refactor: excel import by @cpvalente in #250
• ux: macOS by @cpvalente in #251

Full Changelog: v1.9.2...v1.9.6