add stylers; dim column separators; shrink columns; refactor handlers

src/model.rs

@@ -1,4 +1,5 @@
 use crate::*;
+use crate::ratatui::style::Style;
 
 mod column; pub use self::column::*;
 mod entry;  pub use self::entry::*;
@@ -10,12 +11,17 @@ pub struct Taggart {
     pub cursor:   usize,
     pub offset:   usize,
     pub column:   usize,
-    pub columns:  Columns<fn(&Entry)->Option<Arc<str>>, fn(&mut Self, usize, &str)>,
     pub display:  Measure<TuiOut>,
     /// State of modal dialog of editing field
     pub mode:     Option<Mode>,
     /// Count of changes to items
-    pub changes: usize,
+    pub changes:  usize,
+    /// Table columns to display
+    pub columns:  Columns<
+        fn(&Entry)->Option<Arc<str>>,
+        fn(&mut Self, usize, &str),
+        fn(&Entry)->Option<Style>,
+    >,
 }
 
 #[derive(Debug)]