Search entry: respect shortcut config on Copy key

If the system Copy key sequence (i.e. Ctrl+C or Cmd+C) is pressed while
inside the search entry without any text being selected, previously we
would copy the currently selected entry's password. This made sense when
keyboard shortcuts were fixed. Now that they are configurable, change it
to re-route the event to the main window, which can then take the
appropriate action (i.e. Ctrl+C might be bound to some other action).

src/gui/SearchWidget.cpp

@@ -16,6 +16,7 @@
  */
 
 #include "SearchWidget.h"
+#include "gui/MainWindow.h"
 #include "ui_SearchHelpWidget.h"
 #include "ui_SearchWidget.h"
 
@@ -94,10 +95,12 @@ bool SearchWidget::eventFilter(QObject* obj, QEvent* event)
             emit escapePressed();
             return true;
         } else if (keyEvent->matches(QKeySequence::Copy)) {
-            // If Control+C is pressed in the search edit when no text
-            // is selected, copy the password of the current entry.
+            // If the system Copy shortcut (typically Ctrl+C or Cmd+C) is pressed
+            // in the search edit when no text is selected, route the event to the
+            // main window. With the default shorcut configuration, this will copy
+            // the password of the current entry to the clipboard.
             if (!m_ui->searchEdit->hasSelectedText()) {
-                emit copyPressed();
+                QCoreApplication::sendEvent(getMainWindow(), event);
                 return true;
             }
         } else if (keyEvent->matches(QKeySequence::MoveToNextLine)) {
@@ -135,7 +138,6 @@ void SearchWidget::connectSignals(SignalMultiplexer& mx)
     mx.connect(this, SIGNAL(saveSearch(QString)), SLOT(saveSearch(QString)));
     mx.connect(this, SIGNAL(caseSensitiveChanged(bool)), SLOT(setSearchCaseSensitive(bool)));
     mx.connect(this, SIGNAL(limitGroupChanged(bool)), SLOT(setSearchLimitGroup(bool)));
-    mx.connect(this, SIGNAL(copyPressed()), SLOT(copyPassword()));
     mx.connect(this, SIGNAL(downPressed()), SLOT(focusOnEntries()));
     mx.connect(SIGNAL(requestSearch(QString)), m_ui->searchEdit, SLOT(setText(QString)));
     mx.connect(SIGNAL(clearSearch()), this, SLOT(clearSearch()));

src/gui/SearchWidget.h

@@ -57,7 +57,6 @@ class SearchWidget : public QWidget
     void caseSensitiveChanged(bool state);
     void limitGroupChanged(bool state);
     void escapePressed();
-    void copyPressed();
     void downPressed();
     void enterPressed();
     void lostFocus();