Follow up fix for copy paste (#6820)

Fixes #6293
Also enable paste menu/action for empty libraries with no entries yet

src/main/java/org/jabref/gui/edit/EditAction.java

@@ -7,7 +7,6 @@
 import org.jabref.gui.actions.ActionHelper;
 import org.jabref.gui.actions.SimpleCommand;
 import org.jabref.gui.actions.StandardActions;
-import org.jabref.gui.maintable.MainTable;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -29,7 +28,11 @@ public EditAction(StandardActions action, JabRefFrame frame, StateManager stateM
         this.frame = frame;
         this.stateManager = stateManager;
 
-        this.executable.bind(ActionHelper.needsEntriesSelected(stateManager));
+        if (action == StandardActions.PASTE) {
+            this.executable.bind(ActionHelper.needsDatabase(stateManager));
+        } else {
+            this.executable.bind(ActionHelper.needsEntriesSelected(stateManager));
+        }
     }
 
     @Override
@@ -62,9 +65,9 @@ public void execute() {
                         throw new IllegalStateException("Only cut/copy/paste supported in TextInputControl but got " + action);
                 }
 
-            } else if (focusOwner instanceof MainTable) {
+            } else {
 
-                LOGGER.debug("EditAction - MainTable: {}", frame.getCurrentBasePanel().getTabTitle());
+                LOGGER.debug("EditAction - Else: {}", frame.getCurrentBasePanel().getTabTitle());
                 // Not sure what is selected -> copy/paste/cut selected entries
 
                 // ToDo: Should be handled by BibDatabaseContext instead of BasePanel