Add all Tool Panel append and prepend methods

spec/workspace-view-spec.coffee

@@ -111,7 +111,7 @@ describe "WorkspaceView", ->
         it "passes focus to the first focusable element", ->
           focusable1 = $$ -> @div "One", id: 'one', tabindex: -1
           focusable2 = $$ -> @div "Two", id: 'two', tabindex: -1
-          atom.workspaceView.horizontal.append(focusable1, focusable2)
+          atom.workspaceView.appendToLeft(focusable1, focusable2)
           expect(document.activeElement).toBe document.body
 
           atom.workspaceView.focus()
@@ -120,7 +120,7 @@ describe "WorkspaceView", ->
       describe "when there are no visible focusable elements", ->
         it "surrenders focus to the body", ->
           focusable = $$ -> @div "One", id: 'one', tabindex: -1
-          atom.workspaceView.horizontal.append(focusable)
+          atom.workspaceView.appendToLeft(focusable)
           focusable.hide()
           expect(document.activeElement).toBe document.body
 

src/workspace-view.coffee

@@ -272,12 +272,38 @@ class WorkspaceView extends View
   getOpenBufferPaths: ->
     _.uniq(_.flatten(@getEditorViews().map (editorView) -> editorView.getOpenBufferPaths()))
 
-  prependToBottom: (element)->
+  # Public: Prepends the element to the top of the window.
+  prependToTop: (element) ->
+    @vertical.prepend(element)
+
+  # Public: Appends the element to the top of the window.
+  appendToTop: (element) ->
+    @panes.before(element)
+
+  # Public: Prepends the element to the bottom of the window.
+  prependToBottom: (element) ->
     @panes.after(element)
 
-  appendToBottom: (element)->
+  # Public: Appends the element to bottom of the window.
+  appendToBottom: (element) ->
     @vertical.append(element)
 
+  # Public: Prepends the element to the left side of the window.
+  prependToLeft: (element) ->
+    @horizontal.prepend(element)
+
+  # Public: Appends the element to the left side of the window.
+  appendToLeft: (element) ->
+    @vertical.before(element)
+
+  # Public: Prepends the element to the right side of the window.
+  prependToRight: (element) ->
+    @vertical.after(element)
+
+  # Public: Appends the element to the right side of the window.
+  appendToRight: (element) ->
+    @horizontal.append(element)
+
   # Public: Returns the currently focused {Pane}.
   getActivePane: ->
     @panes.getActivePane()