The last repository cannot be deleted

Originally created by: saul.mar...@gmail.com
Originally owned by: tortoisesvn

What steps will reproduce the problem?
1. Add some SVN repositories or a single repository collection
2. Remove all repositories with the "Remove" button
3. Click again the "Remove" button

What is the expected output? What do you see instead?
The "Remove" button should be disabled, the underlying data sub windows
should be cleared. Instead, both "Remove" button and revision history
windows are left unchanged.

Reproduced with version 1.1.1.238 on Windows XP Pro (DE).

Notes (too lazy to add new issues):
- bug) Deleting a repository collection should remove all contained
repositories. Instead, all repositories below it are moved to the tree root.
- nice to have) Expand '[+]' one commit at the revision list to see its
modified files
- nice to have) Blame or diff each modified file separately (showing the
complete file, not just the changes). The tortoise tools may be used as
externals?