ignore layout/view extensions properly

--remove them manually and do not use baseName()
because it might take into account dots that are
part of the name.

app/settings/exporttemplatedialog/exporttemplatehandler.cpp

@@ -193,7 +193,7 @@ void ExportTemplateHandler::chooseFileDialog()
     });
 
     chooseFileDlg->open();
-    chooseFileDlg->selectFile(currentFile.baseName());
+    chooseFileDlg->selectFile(currentFile.fileName());
 }
 
 void ExportTemplateHandler::onExport()

app/settings/settingsdialog/tablayoutshandler.cpp

@@ -712,7 +712,7 @@ void TabLayouts::exportLayoutForBackup()
     });
 
     exportFileDialog->open();
-    exportFileDialog->selectFile(selectedLayout.name);
+    exportFileDialog->selectFile(selectedLayout.name + ".layout.latte");
 }
 
 void TabLayouts::showDetailsDialog()

app/templates/templatesmanager.cpp

@@ -214,10 +214,10 @@ QString Manager::proposedTemplateAbsolutePath(QString templateFilename)
     QString tempfilename = templateFilename;
 
     if (tempfilename.endsWith(".layout.latte")) {
-        QString clearedname = QFileInfo(tempfilename).baseName();
+        QString clearedname = tempfilename.chopped(QString(".layout.latte").size());
         tempfilename = uniqueLayoutTemplateName(clearedname) + ".layout.latte";
     } else if (tempfilename.endsWith(".view.latte")) {
-        QString clearedname = QFileInfo(tempfilename).baseName();
+        QString clearedname = tempfilename.chopped(QString(".view.latte").size());
         tempfilename = uniqueViewTemplateName(clearedname) + ".view.latte";
     }