skills-display - badges overall percentage does not take into account partial skill/level completion

[rmmayo]

For both global and project badge's, the overall percentage completed is only incremented when a badges required skills and/or levels are fully completed. Consider changing the logic to take into account partially completed dependencies.

☝️ this should probably be at 40% Overall = (2/5 + 2/5) / 2

☝️ this should probably be at 20% Overall = (1/5) / 1

☝️ this should probably be at 75% Overall (1 + 0.5) / 2