Create RemoveAllChestsPlugin.cs

This plugin removes all chests in the current world.
Create RemoveAllUnlockedChestsPlugin.cs

This plugin removes all unlocked chests in the current world.
Create UnlockAllChestsPlugin.cs

This plugin unlocks all chests in the current world.
Update ViewModelLocator.cs

Added plugin entries for three newly added plugins.
Update ChestEditorView.xaml

Now you can edit the name of the chest.
Merge pull request #523 from SBlogic/master

Update World.Settings.cs
Merge pull request #524 from betenner/master

Add three new plugins, chest edit view can now edit chest name.
Update settings and undo location for blocked undo files
settings loader updates
small change to chest plugin, performance boost for large worlds
Add a warning message to user
Merge pull request #530 from SBlogic/master

Added Temporary 1.2.4.1 settings.xml
Merge experimental settings.xml
fix error in xml file
Attempt to fix #531
Merge pull request #1 from TEdit/master

Import latest updates