Replace `editLoaded` with `editMode`

Done for clarity and differentiation with `editPatchsetLoaded`.

Bug: Issue 4437
Change-Id: I05432b202921cad7f906a1cbe9ed68aaeac164cb

polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.html

diff --git a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.html b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.html
index 8e79a9b..4daabe3 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.html
+++ b/polygerrit-ui/app/elements/diff/gr-diff-view/gr-diff-view_test.html
@@ -551,7 +551,7 @@
       element._patchRange = {patchNum: element.EDIT_NAME};
       flushAsynchronousOperations();
 
-      assert.isTrue(element._editLoaded);
+      assert.isTrue(element._editMode);
       element._setReviewed();
       assert.isFalse(saveReviewedStub.called);
     });
@@ -868,15 +868,15 @@
       });
     });
 
-    test('_computeEditLoaded', () => {
-      const callCompute = range => element._computeEditLoaded({base: range});
+    test('_computeEditMode', () => {
+      const callCompute = range => element._computeEditMode({base: range});
       assert.isFalse(callCompute({}));
       assert.isFalse(callCompute({basePatchNum: 'PARENT', patchNum: 1}));
       assert.isFalse(callCompute({basePatchNum: 'edit', patchNum: 1}));
       assert.isTrue(callCompute({basePatchNum: 1, patchNum: 'edit'}));
     });
 
-    suite('editLoaded behavior', () => {
+    suite('editMode behavior', () => {
       setup(() => {
         element._loggedIn = true;
       });