Results 3 issues of light

Fixes API error messages not being displayed properly due to method reference not being called.

When setting up the app for the first time, the app gets stuck on the "Cloning ..." screen. I'm using a self-hosted gitolite repo and a non-standard port. In the...

**Bug description** At some graph widths, data gets displayed with low resolution, even though underlying RRA has enough data points. **To Reproduce** I'm using rrdtool python from Debian testing :...