fix filtered grouped log view

src/ui/grouped_logs.rs

@@ -38,8 +38,15 @@ impl StatefulWidget for GroupedLogs<'_> {
     where
         Self: Sized,
     {
-        let line = &self.app.lines[self.lines[state.selected()]];
         let lines = self.lines.iter().copied().map(|i| &self.app.lines[i]);
+        let line = self
+            .lines
+            .iter()
+            .copied()
+            .map(|i| &self.app.lines[i])
+            .filter(|line| line.matches(self.filter))
+            .nth(state.selected())
+            .unwrap_or(&self.app.lines[0]);
 
         let par = match self.grouping {
             GroupedLogGrouping::Message => Paragraph::new(format!(