code cleanup

NanoVNASaver/skins/dark-colored.css

@@ -1,5 +1,5 @@
 /*
-background foncer 343334
+background dark 343334
 
 background 545254
 background shadow 464446
@@ -170,7 +170,7 @@ QGroupBox {
 }
 
 [cssClass="aboutWindow"] {
-  background-color: #FF0000;
+  background-color: #545254;
 }
 
 [cssClass="dialog"] {

NanoVNASaver/skins/dark-monochrome.css

@@ -138,3 +138,6 @@ QSlider::sub-page:horizontal {
 QSlider::sub-page:horizontal:disabled {
   background-color: palette(light);
 }
+[cssClass="aboutWindow"] {
+  background-color: #545254;
+}

NanoVNASaver/skins/light-colored.css

@@ -176,7 +176,9 @@ QGroupBox {
   color: #000000;
   font-weight: bold;
 }
-
+[cssClass="aboutWindow"] {
+  background-color: #ffffff;
+}
 [cssClass="dialog"] {
   border-radius: 12px;
   border-style: solid;

NanoVNASaver/skins/light-monochrome.css

@@ -135,3 +135,6 @@ QSlider::sub-page:horizontal {
 QSlider::sub-page:horizontal:disabled {
   background-color: palette(light);
 }
+[cssClass="aboutWindow"] {
+  background-color: #ffffff;
+}