chore(theme): add dropShadow theme color and use it where needed

ui/app/AppLayouts/Browser/AddFavoriteModal.qml

@@ -36,7 +36,7 @@ ModalPopup {
             verticalOffset: 5
             radius: 10
             samples: 15
-            color: "#22000000"
+            color: Style.current.dropShadow
         }
     }
 

ui/app/AppLayouts/Browser/BrowserWalletMenu.qml

@@ -31,7 +31,7 @@ Popup {
             verticalOffset: 5
             radius: 10
             samples: 15
-            color: "#22000000"
+            color: Style.current.dropShadow
         }
     }
     padding: Style.current.padding

ui/imports/Themes/DarkTheme.qml

@@ -34,6 +34,7 @@ Theme {
     property color orange: "#FFA500"
 
     property color background: "#2C2C2C"
+    property color dropShadow: "#66000000"
     property color appBarDividerColor: darkGrey
     property color border: darkGrey
     property color borderSecondary: tenPercentWhite

ui/imports/Themes/LightTheme.qml

@@ -34,6 +34,7 @@ Theme {
     property color orange: "#FFA500"
 
     property color background: white
+    property color dropShadow: "#22000000"
     property color appBarDividerColor: darkGrey
     property color border: grey
     property color borderSecondary: tenPercentBlack

ui/imports/Themes/Theme.qml

@@ -33,6 +33,7 @@ QtObject {
     property color orange: "#FE8F59"
 
     property color background
+    property color dropShadow
     property color backgroundHover
     property color backgroundHoverLight
     property color border

ui/shared/ToastMessage.qml

@@ -76,7 +76,7 @@ Popup {
             verticalOffset: 2
             radius: 10
             samples: 15
-            color: "#22000000"
+            color: Style.current.dropShadow
         }
     }
 

ui/shared/status/StatusInputListPopup.qml

@@ -65,7 +65,7 @@ Popup {
             verticalOffset: 2
             radius: 10
             samples: 15
-            color: "#22000000"
+            color: Style.current.dropShadow
         }
     }