TODO

- Make delete items confirmation dialog contain two icons/text with default one selected according to options.

- When closing program warn users that there are minimized operations

- When creating file allow selecting template from currently listed directory.

- On copy/move operation when checking whether the remote directory or file exists we should
check how many parts of path exist and cache that and skip the rest of the files.

- Improve file search and multi-rename windows. Filters on the left.

- Create option to duplicate selected file with new name. In cases where both left and right path
are same and only one file is selected offer this option by default.

- Monitor history file and reload when needed

- Remove duplicates from history file when loading

- Show rename when moving a single file in same directory

- Space counts directory size in separate thread

- Upon receiving focus file list should check validity of its current path

- Letter accelerators on labels

- Create GObject signals for main windows

- Migrate from inheriting gtk.Window to creating self.window

- Directory synchronization

- Duplicate files finder