Fix/redirect to current page after edit

[sinaeftekhar]

When editing the multi-page translation, the update redirects to the first page. This pr fixes this issue and redirects to the same page in view after editing.
This pr fixes issue #101

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (abbf0c6) 96.79% compared to head (7267afa) 96.71%.
Report is 7 commits behind head on master.

Files	Patch %	Lines
...m/term_customizer/admin/translations_controller.rb	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #114      +/-   ##
==========================================
- Coverage   96.79%   96.71%   -0.08%     
==========================================
  Files          58       58              
  Lines        1153     1158       +5     
==========================================
+ Hits         1116     1120       +4     
- Misses         37       38       +1     

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