ENH:Fix incomplete display of the printer block prompt when entering the print submission screen for the first time

jira:[STUDIO-12254]

Change-Id: I642e6a39f063c65fb9d61e8d589d2a326917d370
(cherry picked from commit c0ac52cb58cffcb80db94e8985da94ff1c7add2d)

src/slic3r/GUI/PrePrintChecker.cpp

@@ -177,11 +177,9 @@ void PrinterMsgPanel::SetLabelList(const std::vector<wxString> &texts, const wxC
         return;
 
     m_last_texts = texts;
-
     m_labels.clear();
     m_sizer->Clear(true);
-
-     std::set<wxString> unique_texts;
+    std::set<wxString> unique_texts;
 
     for (const wxString &text : texts) {
         if (text.empty()) {
@@ -226,6 +224,15 @@ wxString PrinterMsgPanel::GetLabel() {
     return wxEmptyString;
 }
 
+
+std::vector<wxString> PrinterMsgPanel::GetLabelList() {
+    if (m_last_texts.empty())
+        wxLogDebug(_L("No labels are currently stored."));
+    return m_last_texts;
+}
+
+
+
 }
 };