many styling changes to applets and palettes applet esp.; all applets seeded w. < 3rows bumped to 3 w. new migration in apps.applets; setting palette no longer reloads entire page, only preset background-color vars; two new ITs in apps.dash.tests.ITs.test_views.SetPaletteTest to ensure dash.views functionality fires; unified h2 applet title html structure & styled its text vertically to waste less applet space

src/static_src/scss/_wallet-tokens.scss

@@ -101,11 +101,6 @@ body.page-wallet {
     flex-direction: column;
     overflow: visible;
 
-    h2 {
-        flex-shrink: 0;
-        margin-bottom: 0;
-    }
-
     .token-row {
         flex: 1;
         display: flex;