#421 "Write into" copy mode for directories

[number Zero]

Dolphin distinguishes normal files and directories when copying, having separate “overwrite” (for normal files) and “write into” (for directories) options. While they both do the same as “overwrite” in PCManFM does, it’s handy to have them separate if you want to use different modes for files and directories, e.g. to copy all the new files in all directories (i.e. “write into, apply to all”), but to keep existing files intact (i.e. “skip, apply to all”).

Also it would be nice if these modes could be set immediately and not on first name collision (note that no file manager I ever saw allows that).