Show paths of files on Chart Summary view

### Description
When looking at the Chart Summary view of any particular scan, I would like to see the path or list of paths for each value in the bar chart. This would make it easier to deduce the correct copyright/license statements for a package/component/etc at a high level.

Oftentimes, copyleft licenses and FSF copyrights show up in Makefiles or other irrelevant files, which clouds the data and forces me to drill down to the individual file level in order to determine the actual correct license/copyright.

**AboutCode Manager Version**:
* latest release

**ScanCode Toolkit Version**:
* latest develop

### Additional Information
In the pic below, hovering over a copyright value just makes it show up in the hover text box. This is somewhat redundant; I would rather this be the full path so I can determine if this file(s) is something I should look at further.