CE-135: Adjusting Operations searchbar placeholder

Adjusted the searchbar-placeholder for log table to show the correct info. Also the placeholder text will not overlap with the border:

requested review from @alexandermadsen, @christinajenks, and @domonkosgulyas

assigned to @imretoth

mentioned in merge request ce-deploy-backend!335 (merged)

approved this merge request

code

mentioned in commit e30c2d1f

merged