clear search results if empty string is passed to FindForward/Backward

src/browser.cpp

@@ -271,6 +271,11 @@ bool Browser::allowsSearching()
 
 bool Browser::search(const std::string &constraint)
 {
+	if (constraint.empty())
+	{
+		w.clearSearchResults();
+		return false;
+	}
 	try
 	{
 		auto fun = std::bind(BrowserEntryMatcher, _1, _2, false);

src/media_library.cpp

@@ -596,6 +596,16 @@ bool MediaLibrary::allowsSearching()
 
 bool MediaLibrary::search(const std::string &constraint)
 {
+	if (constraint.empty())
+	{
+		if (isActiveWindow(Tags))
+			Tags.clearSearchResults();
+		else if (isActiveWindow(Albums))
+			Albums.clearSearchResults();
+		else if (isActiveWindow(Songs))
+			Songs.clearSearchResults();
+		return false;
+	}
 	try
 	{
 		bool result = false;

src/playlist.cpp

@@ -161,6 +161,11 @@ bool Playlist::allowsSearching()
 
 bool Playlist::search(const std::string &constraint)
 {
+	if (constraint.empty())
+	{
+		w.clearSearchResults();
+		return false;
+	}
 	try
 	{
 		auto rx = RegexFilter<MPD::Song>(

src/playlist_editor.cpp

@@ -364,6 +364,14 @@ bool PlaylistEditor::allowsSearching()
 
 bool PlaylistEditor::search(const std::string &constraint)
 {
+	if (constraint.empty())
+	{
+		if (isActiveWindow(Playlists))
+			Playlists.clearSearchResults();
+		else if (isActiveWindow(Content))
+			Content.clearSearchResults();
+		return false;
+	}
 	try
 	{
 		bool result = false;

src/search_engine.cpp

@@ -284,6 +284,11 @@ bool SearchEngine::allowsSearching()
 
 bool SearchEngine::search(const std::string &constraint)
 {
+	if (constraint.empty())
+	{
+		w.clearSearchResults();
+		return false;
+	}
 	try
 	{
 		auto fun = std::bind(SEItemEntryMatcher, _1, _2, false);

src/tag_editor.cpp

@@ -770,6 +770,14 @@ bool TagEditor::allowsSearching()
 
 bool TagEditor::search(const std::string &constraint)
 {
+	if (constraint.empty())
+	{
+		if (w == Dirs)
+			Dirs->clearSearchResults();
+		else if (w == Tags)
+			Tags->clearSearchResults();
+		return false;
+	}
 	try
 	{
 		bool result = false;