MainWindow::treeSchemaDock make copy shortcut use widget context

Changed shortcut context to Qt::WidgetShortcut to restrict activation to when treeSchemaDock has focus.

Previously, the shortcut used Qt::WindowShortcut,
which allowed it to trigger anywhere in the window.
This caused it to override other shortcuts—preventing ExtendedTableWidget from using its own copy shortcut.

MainWindow::treeSchemaDock make copy shortcut use widget context

Changed shortcut context to Qt::WidgetShortcut to restrict activation to when treeSchemaDock has focus.

Previously, the shortcut used Qt::WindowShortcut,
which allowed it to trigger anywhere in the window.
This caused it to override other shortcuts—preventing ExtendedTableWidget from using its own copy shortcut.

Last locations: fixed absolute path for "Execute SQL" dialogs

Issue #3831

Release v3.13.1

Add x86_64 architecture support for 'formats' extension

Related: #3796

Updated for 'MainWindow/Edit Pragmas' tab, ColumnDisplayFormatDialog …

…and other minot things

This should fix #2567

[skip ci] Revised CHANGELOG file (#3675)

DB Browser for SQLite 3.12.2

DB Browser for SQLite 3.12.1