Changelog for v0.3.4.1

Fix: [#15028] Crash when placing large scenery.
Fix: [#15048] Crash when removing litter with cheats.
Fix: [#15052] Crash when using banner window.
Fix: [#15063] Crash when opening large scenery signs.
Improved: [#12626] Allow using RCT2 saves to mark RCT Classic (.sea) parks as finished and vice versa.