ui: use the same blue style for all three profiler list buttons

'Import profile' now matches 'New profile' and 'Profile from card'
(bg-blue-600). SW cache v62 -> v63.

frontend/index.html

@@ -816,7 +816,7 @@
 				<div class="flex flex-wrap gap-2 mb-3">
 					<button onclick="profilerNew()" class="px-2.5 py-1 text-sm rounded bg-blue-600 text-white hover:bg-blue-700" data-l10n="New profile">New profile</button>
 					<button onclick="profilerFromCard()" class="px-2.5 py-1 text-sm rounded bg-blue-600 text-white hover:bg-blue-700" data-l10n="Profile from card">Profile from card</button>
-					<button onclick="document.getElementById('profiler-import-file').click()" class="px-2.5 py-1 text-sm rounded bg-gray-600 text-white hover:bg-gray-700" data-l10n="Import profile">Import profile</button>
+					<button onclick="document.getElementById('profiler-import-file').click()" class="px-2.5 py-1 text-sm rounded bg-blue-600 text-white hover:bg-blue-700" data-l10n="Import profile">Import profile</button>
 					<input type="file" id="profiler-import-file" accept=".json,application/json" class="hidden" onchange="profilerImportFile(this)">
 				</div>
 				<div id="profiler-list-body"></div>

frontend/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'otaman-v62';
+const CACHE = 'otaman-v63';
 const URLS = [
   'index.html',
   'help.html',