Fix timezone names

[tcitworld]

Some timezones have more than one / in their name, and only the first part was being used.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Before	After

[codecov]

Codecov Report

Merging #2292 into master will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #2292      +/-   ##
============================================
+ Coverage     27.63%   27.64%   +0.01%     
  Complexity      103      103              
============================================
  Files           144      144              
  Lines          5287     5288       +1     
  Branches        798      798              
============================================
+ Hits           1461     1462       +1     
  Misses         3826     3826              

Flag	Coverage Δ	Complexity Δ
#javascript	22.27% <100.00%> (+0.01%)	0.00 <0.00> (ø)
#php	94.41% <ø> (ø)	103.00 <ø> (ø)

Impacted Files	Coverage Δ	Complexity Δ
src/utils/timezone.js	96.66% <100.00%> (+0.11%)	0.00 <0.00> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 827a71b...c37f762. Read the comment docs.