fix(hotcorners): keep one pending setCorner call per corner

src/pages/hotcorners/hotcorners.cpp

@@ -87,12 +87,12 @@ void HotCorners::setCorner(const std::string& corner, const std::string& action,
 {
     if (!m_available)
         return;
-    m_calls.push_back(m_corners.callAsync("setCorner", [this](const dbus::Reply& reply) {
+    m_calls[corner] = m_corners.callAsync("setCorner", [this](const dbus::Reply& reply) {
         if (reply.isError()) {
             fprintf(stderr, "Cannot update hot corner: %s\n", reply.error().message.c_str());
             changed.emit();
         }
-    }, corner, action, int32_t(modifiers)));
+    }, corner, action, int32_t(modifiers));
 }
 
 int HotCorners::heldModifiers() const

src/pages/hotcorners/hotcorners.h

@@ -3,6 +3,7 @@
 
 #pragma once
 
+#include <map>
 #include <string>
 
 #include "base/dbus.h"
@@ -38,7 +39,8 @@ private:
     cutefish::base::dbus::NameWatch m_watch;
     cutefish::base::dbus::Match m_changedMatch;
     cutefish::base::dbus::PendingCall m_reload;
-    std::vector<cutefish::base::dbus::PendingCall> m_calls;
+    // By corner: a newer change of a corner replaces its older one.
+    std::map<std::string, cutefish::base::dbus::PendingCall> m_calls;
     cutefish::base::dbus::VariantMap m_properties;
     bool m_available = false;
     bool m_commandKeys = false;