Three FontChooser ContinueWith handlers wrote Mutable.* directly from
the threadpool. Wrap the result-write in Plugin.Framework.Run so the
mutation lands on the same thread that owns the rest of the UI state.
Matches the marshalling pattern already used by Database.cs and
Privacy.cs background work.
- Configuration.cs: ShowTitleBar defaults to true so a fresh install
shows the window header instead of leaving the user without a drag
handle and hide button
- Configuration.cs: MaxLinesToRender default drops from 10000 to 5000
to match the slider's intended ceiling and the previous user-tuned
baseline
- ChatLogWindow.cs: 24h-clock checkbox now actually flips the format.
The Bestand path passed null culture which on a German system
locale always rendered 24h regardless of the toggle
- Appearance.cs + ChatLogWindow.cs + Popout.cs: when Hellion theme is
enabled the global theme opacity drives the chat-window BgAlpha and
the legacy WindowAlpha slider is disabled, so the two opacity
controls no longer fight each other
- Appearance.cs: ticking UseHellionFont now flips FontsEnabled off so
the two mutually-exclusive font stacks no longer appear active at
the same time
JonKazama-Hellion