fix: replace defines with constexpr/const and use more absolute paths for includes (#5527)

bye bye nuuls

src/widgets/helper/ChannelView.cpp

@@ -68,12 +68,10 @@
 #include <functional>
 #include <memory>
 
-#define SELECTION_RESUME_SCROLLING_MSG_THRESHOLD 3
-#define CHAT_HOVER_PAUSE_DURATION 1000
-#define TOOLTIP_EMOTE_ENTRIES_LIMIT 7
-
 namespace {
 
+constexpr size_t TOOLTIP_EMOTE_ENTRIES_LIMIT = 7;
+
 using namespace chatterino;
 
 constexpr int SCROLLBAR_PADDING = 8;