Colorize entire split input header instead of just the channel name (#3379)

Co-authored-by: Paweł <zneix@zneix.eu>

src/singletons/Theme.cpp

@@ -62,8 +62,11 @@ void Theme::actuallyUpdate(double hue, double multiplier)
     this->splits.header.background = getColor(0, sat, flat ? 1 : 0.9);
     this->splits.header.border = getColor(0, sat, flat ? 1 : 0.85);
     this->splits.header.text = this->messages.textColors.regular;
-    this->splits.header.focusedText =
-        isLight ? QColor("#198CFF") : QColor("#84C1FF");
+    this->splits.header.focusedBackground =
+        getColor(0, sat, isLight ? 0.95 : 0.79);
+    this->splits.header.focusedBorder = getColor(0, sat, isLight ? 0.90 : 0.78);
+    this->splits.header.focusedText = QColor::fromHsvF(
+        0.58388, isLight ? 1.0 : 0.482, isLight ? 0.6375 : 1.0);
 
     this->splits.input.background = getColor(0, sat, flat ? 0.95 : 0.95);
     this->splits.input.border = getColor(0, sat, flat ? 1 : 1);

src/singletons/Theme.hpp

@@ -31,7 +31,9 @@ public:
 
         struct {
             QColor border;
+            QColor focusedBorder;
             QColor background;
+            QColor focusedBackground;
             QColor text;
             QColor focusedText;
             // int margin;

src/widgets/splits/SplitHeader.cpp

@@ -785,11 +785,19 @@ void SplitHeader::paintEvent(QPaintEvent *)
 {
     QPainter painter(this);
 
-    painter.fillRect(rect(), this->theme->splits.header.background);
-    painter.setPen(this->theme->splits.header.border);
+    QColor background = this->theme->splits.header.background;
+    QColor border = this->theme->splits.header.border;
+
+    if (this->split_->hasFocus())
+    {
+        background = this->theme->splits.header.focusedBackground;
+        border = this->theme->splits.header.focusedBorder;
+    }
+
+    painter.fillRect(rect(), background);
+    painter.setPen(border);
     painter.drawRect(0, 0, width() - 1, height() - 2);
-    painter.fillRect(0, height() - 1, width(), 1,
-                     this->theme->splits.background);
+    painter.fillRect(0, height() - 1, width(), 1, background);
 }
 
 void SplitHeader::mousePressEvent(QMouseEvent *event)
@@ -909,6 +917,8 @@ void SplitHeader::themeChangedEvent()
         this->dropdownButton_->setPixmap(getResources().buttons.menuLight);
         this->addButton_->setPixmap(getResources().buttons.addSplitDark);
     }
+
+    this->update();
 }
 
 void SplitHeader::reloadChannelEmotes()