~/.config/youtube-dlg should just contain configuration files and not logs (which should go to $XDG_DATA_HOME/youtube-dlg/ ) nor youtube-dl binary (which should go to $XDG_CACHE_HOME).

Please also consider using appdirs instead of hardcoding ~/.config/

Currently we save every URI ever qname'd forever in here: https://github.com/RDFLib/rdflib/blob/master/rdflib/namespace.py#L289

If you serialize a big graph in a store that is off disk, we may run out of memory.

Either:

• Add a lru_cache (from py3 functools + this 2.7 implementation
• Depend on

Describe the issue
In dark mode - hard to see three dots in node to open common props when not highlighted

To Reproduce
Steps to reproduce the behavior:
0. Activate dark mode,

1. Go to pipeline editor, drag a notebook to create a node
2. Scroll over the node and highlight the 3 dots.

Screenshots or log output
![image](https://user-images.githubusercontent.com/13340013/11038

Currently if you try to clone a repository from github and you don't have any ssh keys configured at github, you will fail to clone and get such message:

Fatal error: fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

Even Permission denied (publickey). message is not shown.

@guyzmo offered to "suggest a