Improve UI placeholder message

[yurishkuro]

Fixes #2486.

[codecov]

Codecov Report

Merging #2487 into master will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2487   +/-   ##
=======================================
  Coverage   95.52%   95.52%           
=======================================
  Files         208      208           
  Lines       10759    10759           
=======================================
+ Hits        10277    10278    +1     
+ Misses        406      405    -1     
  Partials       76       76           

Impacted Files	Coverage Δ
plugin/storage/integration/integration.go	81.39% <0.00%> (+0.46%)	⬆️

---

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 4dd57f3...c5ef1fa. Read the comment docs.