Reduce misleading of cluster edges

[Kr0nox]

This PR overhauls the edge still of the cluster graph, to make them misleading (for example, that an edge with a similarity of 90% can have the minimal thickness and opacity)
The edge thickness is now clamped between 0 and 100 percent instead of the min and max
The edge opacity is now mapped between the max and the smaller value of 50% or the min

More detailed math

Lets call the highest similarity of any comparison in the cluster $sim_{max}$ and the lowest $sim_{min}$.
Lets take a comparison with similarity $sim$.
Its thickness will be equal to:
$thickness = \frac{sim - 0}{1 - 0} * 5 + 1 = sim * 5 + 1$
Opacity is calculated like this:
$opacity = \frac{sim - min(sim_{min}, 0.5)}{sim_{max} - min({sim_{min}}, 0.5)} * 0.7 +0.3$

Comparison 1

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Comparison 2

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Comparison 3

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[sonarcloud]

Quality Gate passed for 'JPlag Report Viewer'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud