Ineffective CSS shorthand uses in various .vue files

[catchingknives]

Shorthands defined after longhand properties override longhand and make it redundant.

Files affected:

• src/renderer/components/Badge/AttentionBadge.vue (lines 22 & 23)
• src/renderer/components/Sidebar.vue (lines 148 & 149)
• src/renderer/components/WarningWalletWithoutMnemonics.vue (lines 198 & 201)