Removed GTK2 compatibility shims from headers (fe-gtk.h, gtkutil.h), leaving direct GTK3-facing declarations/includes only (and platform-specific guards unrelated to GTK2 kept as-is).
Cleaned GTK2-specific comments/wording now that behavior is GTK3-native (menu accelerator note and emoji/userlist comment blocks).
Initialized each new channel row with PANGO_UNDERLINE_NONE so only the active channel gets emphasized.
Updated tree selection handling to remove underline from the previously focused row and apply PANGO_UNDERLINE_SINGLE to the newly selected row, creating a clear “currently viewed channel” indicator.
Bound the channel name renderer’s underline property to the new model column so underline changes are reflected immediately in the channel list UI.
Guarded tree view palette application to use GTK3 font descriptions or GTK2 styles appropriately.
Adjusted the chanview creation call site to pass GTK3 font descriptions or GTK2 styles based on the build.
Switched channel tree and theme application logic to use the new palette helper.
Updated entry and user list styling to route palette/font application through the helper.
-Replaced GtkStyle application in the channel tree view with explicit base/text/font modifications to avoid style attach/detach issues on teardown.
-Updated user list styling to apply the font directly instead of setting a shared GtkStyle instance.
-Switched color button updates to use background modifications instead of creating per-button styles, reducing detach warnings on shutdown.
This is the first step to build with GSEAL_ENABLE
setup.c uses a deprecated fontchooser,
chanview-tabs.c didn't like the conversion, and
I am waiting to do some work on xtext.c before
converting it.
