Lukáš Tinkl 33154a178a fix(SearchPopup): align with design
Needed for status-im/status-desktop#6428

- set the default icon background color to "transparent"; otherwise it
would be black when unset
- set the popup default size to 560x122 (as designed)
- add placeholder for the search field
- correct the font and icon sizes, spacing and margins according to
design
- fix some warnings
2022-09-21 18:20:12 +02:00
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