Make buffers fill from the bottom, and render each paragraph individually

The goal of rendering paragraph individually is to eventually avoid
redrawing everything every time there is a change

src/buffers/log.rs

@@ -39,20 +39,23 @@ impl Buffer for LogBuffer {
     "ratatrix".to_owned()
   }
 
-  fn content(&self) -> Text {
+  fn content(&self) -> Vec<Text> {
+    use ansi_to_tui::IntoText;
     let lines = self
       .lines
       .read()
       .expect("LogBuffer could not get log's RwLock as it is poisoned");
     let (slice1, slice2) = lines.as_slices();
-    let text = if slice1.is_empty() {
-      slice2.join("\n")
-    } else if slice2.is_empty() {
-      slice1.join("\n")
-    } else {
-      format!("{}\n{}", slice1.join("\n"), slice2.join("\n"))
-    };
-    use ansi_to_tui::IntoText;
-    text.clone().into_text().unwrap_or_else(|_| text.into())
+    slice1
+      .into_iter()
+      .chain(slice2.into_iter())
+      .cloned()
+      .map(|line| {
+        line.into_text().unwrap_or_else(|e| {
+          tracing::error!("Could not convert line from ANSI codes to ratatui: {}", e);
+          Text::raw(line)
+        })
+      })
+      .collect()
   }
 }