minor commenting and formatting.

src/main/java/org/jewelsea/willow/browser/LoadingProgressDisplay.java

@@ -27,14 +27,27 @@
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.Priority;
 
-/** create controls to monitor webview loading. */
+/**
+ * A control to monitor worker progress.
+ *
+ * Used for showing progress of WebView loading.
+ */
 public class LoadingProgressDisplay extends ProgressBar {
 
+    /**
+     * Creates a UI display monitor for provided worker.
+     *
+     * Assumes the worker is reporting progress as work done on a scale from 0 to 100 (other values indicate indeterminate progress).
+     *
+     * @param worker the worker whose progress is to be monitored and displayed.
+     */
     public LoadingProgressDisplay(Worker worker) {
         setMaxWidth(Double.MAX_VALUE);
+
         ColorAdjust bleach = new ColorAdjust();
         bleach.setSaturation(-0.6);
         setEffect(bleach);
+
         HBox.setHgrow(this, Priority.ALWAYS);
 
         visibleProperty().bind(worker.runningProperty());

src/main/java/org/jewelsea/willow/browser/StatusDisplay.java

@@ -34,10 +34,12 @@ public StatusDisplay(StringExpression statusProperty) {
         Text statusText = new Text();
         statusText.textProperty().bind(statusProperty);
         HBox.setMargin(statusText, new Insets(1, 6, 3, 6));
+
         setEffect(new DropShadow());
         getStyleClass().add("status-background");
         getChildren().add(statusText);
         setVisible(false);
+
         statusText.textProperty().addListener((observableValue, oldValue, newValue) ->
                 setVisible(newValue != null && !newValue.equals(""))
         );

src/main/java/org/jewelsea/willow/browser/TabManager.java

@@ -125,6 +125,13 @@ public Button getNewTabButton() {
         return newTabButton;
     }
 
+    /**
+     * Places a new tab under management.
+     * Selects the newly added tab so that it is visible.
+     * Updates the chrome's location field to reflect the newly managed and visible tab.
+     *
+     * @param tab the browser tab to be added to the chrome.
+     */
     void addTab(BrowserTab tab) {
         tabPane.getTabs().add(tab);
         tabPane.getSelectionModel().selectLast();