wip: basic theming support

ui/qmls/App.qml

@@ -10,6 +10,45 @@ ApplicationWindow {
     width: 800
     height: 600
 
+    SystemPalette {
+        id: systemPaletteActive
+        colorGroup: SystemPalette.Active
+    }
+
+    SystemPalette {
+        id: systemPaletteDisabled
+        colorGroup: SystemPalette.Disabled
+    }
+
+    palette {
+        accent: systemPaletteActive.accent
+        alternateBase: systemPaletteActive.alternateBase
+        base: systemPaletteActive.base
+        button: systemPaletteActive.button
+        buttonText: systemPaletteActive.buttonText
+        dark: systemPaletteActive.dark
+        highlight: systemPaletteActive.highlight
+        highlightedText: systemPaletteActive.highlightedText
+        light: systemPaletteActive.light
+        mid: systemPaletteActive.mid
+        midlight: systemPaletteActive.midlight
+        placeholderText: systemPaletteActive.placeholderText
+        shadow: systemPaletteActive.shadow
+        text: systemPaletteActive.text
+        window: systemPaletteActive.window
+        windowText: systemPaletteActive.windowText
+
+        disabled {
+            button: systemPaletteDisabled.button
+            buttonText: systemPaletteDisabled.buttonText
+        }
+
+        inactive {
+            button: systemPaletteDisabled.button
+            buttonText: systemPaletteDisabled.buttonText
+        }
+    }
+
     StackLayout {
         id: stackLayout
         anchors.fill: parent

ui/qmls/DatabaseChecker/Section_DatabaseInfo.qml

@@ -27,8 +27,7 @@ ColumnLayout {
     function displayBool(value): string {
         if (value === undefined)
             return '-';
-        // TODO: color success & error
-        return value ? `<font color="lightgreen">Yes</font>` : `<font color="lightpink">No</font>`;
+        return value ? `<font color="${appTheme.success}">Yes</font>` : `<font color="${appTheme.error}">No</font>`;
     }
 
     component LabelLabel: Label {