Fixed crash when editing the display format while the currently brows…

…ed table name is actually a view (#1196)

* Added an option in the context menu for using the currently selected cell
as filter in this column. This allows quick filtering by selected values.

* Changes to pull request #1182 requested by @MKleusberg: get internal cell data and check for the NULL special case.

* Updated Spanish translation.
Reviewed translation following guidelines the KDE Spanish Translation Team: https://es.l10n.kde.org/
Warnings raised by linguist have been solved.

* Fixed crashed when editing the display format and the currently browsed table name is actually a view.

Now it is checked the object type before the cast. This avoids the crash and the field name is obtained for each case.

src/MainWindow.cpp

@@ -2400,8 +2400,11 @@ void MainWindow::editDataColumnDisplayFormat()
     // column is always the rowid column. Ultimately, get the column name from the column object
     sqlb::ObjectIdentifier current_table = currentlyBrowsedTableName();
     int field_number = sender()->property("clicked_column").toInt();
-    QString field_name = db.getObjectByName(current_table).dynamicCast<sqlb::Table>()->fields().at(field_number-1)->name();
-
+    QString field_name;
+    if (db.getObjectByName(current_table)->type() == sqlb::Object::Table)
+      field_name = db.getObjectByName(current_table).dynamicCast<sqlb::Table>()->fields().at(field_number-1)->name();
+    else
+      field_name = db.getObjectByName(current_table).dynamicCast<sqlb::View>()->fieldNames().at(field_number-1);
     // Get the current display format of the field
     QString current_displayformat = browseTableSettings[current_table].displayFormats[field_number];