Update the "View Options" menu for recent filetree changes

Summary:
Ref T13516. Minor improvements here:

  - Show key commands in the "View Options" dropdown.
  - Organize it slightly better.
  - Improve disabled item behaviors a little bit.
  - Add a "Browse Directory" action.
  - Rename "...in Diffusion" to "...in Repository".
  - Make "d", "D", and "h" use the same targeting rules as "\".
  - When you hide a file with the "h" menu item, select it.

Test Plan: Poked at the menu a lot, ran into less questionable behavior.

Maniphest Tasks: T13516

Differential Revision: https://secure.phabricator.com/D21160

webroot/rsrc/js/application/diff/DiffChangeset.js

@@ -34,6 +34,8 @@ JX.install('DiffChangeset', {
 
     this._editorURI = data.editorURI;
     this._editorConfigureURI = data.editorConfigureURI;
+    this._showPathURI = data.showPathURI;
+    this._showDirectoryURI = data.showDirectoryURI;
 
     this._pathIconIcon = data.pathIconIcon;
     this._pathIconColor = data.pathIconColor;
@@ -76,6 +78,9 @@ JX.install('DiffChangeset', {
 
     _editorURI: null,
     _editorConfigureURI: null,
+    _showPathURI: null,
+    _showDirectoryURI: null,
+
     _pathView: null,
 
     _pathIconIcon: null,
@@ -92,6 +97,14 @@ JX.install('DiffChangeset', {
       return this._editorConfigureURI;
     },
 
+    getShowPathURI: function() {
+      return this._showPathURI;
+    },
+
+    getShowDirectoryURI: function() {
+      return this._showDirectoryURI;
+    },
+
     getLeftChangesetID: function() {
       return this._leftID;
     },