have the "break locks" options enabled by default to increase the chance that the cleanup succeeds.

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk@25951 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac
After moving files/folders to the trash, create them again to avoid svn throwing an error.

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk@25952 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac
Avoid a double newline when adding new externals after a drop.

git-svn-id: http://tortoisesvn.googlecode.com/svn/trunk@25953 4cfb86a4-2c7a-11df-bd14-c1e331e6ceac