using font awesome icon to render color dot

[kevinpapst]

Description

Prevent text wrapping after color dot in large tables

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I verified that my code applies to the guidelines (composer kimai:code-check)
• I updated the documentation (see here)
• I agree that this code is used in Kimai and will be published under the MIT license

[codecov]

Codecov Report

Merging #1656 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1656   +/-   ##
=========================================
  Coverage     92.20%   92.20%           
  Complexity     4806     4806           
=========================================
  Files           445      445           
  Lines         14903    14903           
=========================================
  Hits          13741    13741           
  Misses         1162     1162           

Impacted Files	Coverage Δ	Complexity Δ
src/Twig/IconExtension.php	100.00% <ø> (ø)	2.00 <0.00> (ø)