Embedding Projector: fix status bar display (#6312)

## Motivation for features / changes
fix status bar display

## Technical description of changes
Status bar is always hidden, change it so it shows appropriately

## Screenshots of UI changes
Before:

![image](https://user-images.githubusercontent.com/31378877/232665924-8385dc3e-82e2-4680-8a06-0f2f090a34a4.png)
After:

![image](https://user-images.githubusercontent.com/31378877/232665977-2177dd2a-7d7b-4d55-9fe9-d190b7081c8a.png)


## Detailed steps to verify changes work correctly (as executed by you)
hover over a point and verify status bar changes

## Alternate designs / implementations considered

Author: alicialics

tensorboard/plugins/projector/vz_projector/vz-projector.ts

@@ -588,7 +588,8 @@ class Projector
     }
     if (this.selectedPointIndices.length === 0) {
       if (hoverText) {
-        this.statusBar.innerText = hoverText!;
+        this.statusBar.innerText = hoverText;
+        this.statusBar.style.display = null!;
       } else {
         this.statusBar.style.display = 'none';
       }
@@ -611,6 +612,8 @@ class Projector
       this.selectedPointIndices.length + neighborsOfFirstPoint.length;
     this.statusBar.innerText = `Selected ${totalNumPoints} points`;
     if (totalNumPoints > 0) {
+      this.statusBar.style.display = null!;
+    } else {
       this.statusBar.style.display = 'none';
     }
   }