Add in accessibility support for screen readers:

   ContributedLibraryTableCellJPanel.java: Add description to accessibility context
   ContributedPlatformTableCellJPanel.java: Add description to accessibility context

   ProgressJProgressBar.java:
      Add status to accessibility context
      make progress bar focusable so screen reader can access

app/src/cc/arduino/contributions/libraries/ui/ContributedLibraryTableCellJPanel.java

@@ -193,6 +193,8 @@ public ContributedLibraryTableCellJPanel(JTable parentTable, Object value,
 
     desc += "</body></html>";
     description.setText(desc);
+    // copy description to accessibility context for screen readers to use
+    description.getAccessibleContext().setAccessibleDescription(desc);
     description.setBackground(Color.WHITE);
 
     // for modelToView to work, the text area has to be sized. It doesn't

app/src/cc/arduino/contributions/packages/ui/ContributedPlatformTableCellJPanel.java

@@ -230,6 +230,8 @@ void update(JTable parentTable, Object value, boolean isSelected,
 
     desc += "</body></html>";
     description.setText(desc);
+    // copy description to accessibility context for screen readers to use
+    description.getAccessibleContext().setAccessibleDescription(desc);
     description.setBackground(Color.WHITE);
 
     // for modelToView to work, the text area has to be sized. It doesn't

app/src/cc/arduino/contributions/ui/ProgressJProgressBar.java

@@ -38,8 +38,13 @@ public class ProgressJProgressBar extends JProgressBar {
 
   public void setValue(Progress p) {
     setValue((int) p.getProgress());
-    if (p.getStatus() != null)
+    if (p.getStatus() != null) {
       setString(p.getStatus());
+      // copy status to accessibility context for screen readers to use
+      getAccessibleContext().setAccessibleDescription(p.getStatus());
+      // make status focusable so screen readers can get to it
+      setFocusable(true);
+    }
   }
 
 }