Make the copy button switch light/dark theme (#3057)

Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/singletons/Theme.cpp

@@ -1,12 +1,15 @@
-#define LOOKUP_COLOR_COUNT 360
 
 #include "singletons/Theme.hpp"
+
 #include "Application.hpp"
+#include "singletons/Resources.hpp"
 
 #include <QColor>
 
 #include <cmath>
 
+#define LOOKUP_COLOR_COUNT 360
+
 namespace chatterino {
 
 Theme::Theme()
@@ -80,6 +83,16 @@ void Theme::actuallyUpdate(double hue, double multiplier)
     this->splits.background = getColor(0, sat, 1);
     this->splits.dropPreview = QColor(0, 148, 255, 0x30);
     this->splits.dropPreviewBorder = QColor(0, 148, 255, 0xff);
+
+    // Copy button
+    if (this->isLightTheme())
+    {
+        this->buttons.copy = getResources().buttons.copyDark;
+    }
+    else
+    {
+        this->buttons.copy = getResources().buttons.copyLight;
+    }
 }
 
 void Theme::normalizeColor(QColor &color)

src/singletons/Theme.hpp

@@ -48,6 +48,10 @@ public:
         } input;
     } splits;
 
+    struct {
+        QPixmap copy;
+    } buttons;
+
     void normalizeColor(QColor &color);
 
 private:

src/widgets/dialogs/UserInfoPopup.cpp

@@ -13,6 +13,7 @@
 #include "providers/twitch/api/Kraken.hpp"
 #include "singletons/Resources.hpp"
 #include "singletons/Settings.hpp"
+#include "singletons/Theme.hpp"
 #include "util/Clipboard.hpp"
 #include "util/Helpers.hpp"
 #include "util/LayoutCreator.hpp"
@@ -42,7 +43,7 @@ namespace {
     {
         auto label = box.emplace<Label>();
         auto button = box.emplace<Button>();
-        button->setPixmap(getResources().buttons.copyDark);
+        button->setPixmap(getApp()->themes->buttons.copy);
         button->setScaleIndependantSize(18, 18);
         button->setDim(Button::Dim::Lots);
         QObject::connect(