Adjust dashboard grid spacing and tile size

src/gui/src/css/dashboard.css

@@ -442,7 +442,7 @@ body {
 
 .myapps-search-wrap {
     position: relative;
-    margin-bottom: 24px;
+    margin-bottom: 40px;
     max-width: 360px;
     margin-left: auto;
     margin-right: auto;
@@ -517,8 +517,8 @@ body {
 .myapps-grid {
     display: grid;
     grid-template-columns: repeat(auto-fill, 80px);
-    gap: 24px 20px;
-    justify-content: start;
+    gap: 24px 24px;
+    justify-content: center;
     opacity: 1;
     transition: opacity 0.2s ease;
 }
@@ -538,8 +538,8 @@ body {
 }
 
 .myapps-tile-icon {
-    width: 60px;
-    height: 60px;
+    width: 48px;
+    height: 48px;
     overflow: hidden;
     background: var(--dashboard-card-background);
     transition: transform 0.15s ease, box-shadow 0.15s ease;