Colors: slight rework of the default colorscheme and overall colors usage

Modules/Settings/SettingsPanel.qml

@@ -281,7 +281,7 @@ NLoader {
             Layout.fillWidth: true
             Layout.fillHeight: true
             radius: Style.radiusMedium * scaling
-            color: Colors.surface
+            color: Colors.surfaceVariant
             border.color: Colors.outline
             border.width: Math.max(1, Style.borderThin * scaling)
             clip: true

Modules/Settings/Tabs/About.qml

@@ -168,10 +168,10 @@ ColumnLayout {
       }
 
       NText {
-        text: `Contributors: ${root.contributors.length}`
+        text: `Shout-out to our ${root.contributors.length} awesome contributors!`
         font.pointSize: Style.fontSizeLarge * scaling
         font.weight: Style.fontWeightBold
-        color: Colors.textPrimary
+        color: Colors.textSecondary
         Layout.alignment: Qt.AlignCenter
         Layout.topMargin: Style.marginLarge * 2
       }