Log Message:
pluma: update to 1.21.2:

### pluma 1.21.2

  * sync with transifex
  * tx: update translation sources
  * Use the same legal.xml file
  * Use make functions for HELP_LINGUAS
  * tx: update help source for transifex
  * tx: improve makepot
  * Refer to the strftime(3) man page for more information...
  * Refer to the pluma(1) man page for more information...
  * Remove unused screenshots
  * tx: update transifex source
  * Fix spelling and grammar mistakes
  * help: fix help links
  * Use actual pluma screenshot for Catalan
  * Use actual pluma screenshot
  * tx: generate userguide source
  * tx: add pluma-user-guide to transifex config
  * Fix spelling and grammar mistakes
  * prefs-manager: silent some build warnings
  * fix a few introspection and doc warnings
  * Fix search backwards with regex
  * pluma-document: fix possible memory leak
  * pluma-view: Fix: Don't loss the PRIMARY clipboard
  * pluma-document: Fix: don't crash using files with 'bom'
  * make the 'close confirmation dialog' bigger with multiple files
  * pluma-view: Fix: unexpectedly switch between tabs
  * close-confirmation-dialog: Fix: don't resize the dialog unexpectedly
  * pluma-sort-plugin: avoid extra empty line
  * pluma-view: Fix bold and italic fonts in menus
  * spell plugin: Autocheck spelling with [control + F7]
  * add the option to hide the frist tab if there is only one tab
  * notebook: drop unused 'pluma_notebook_set_always_show_tabs'
  * pluma-view: Fix possible memory leak
  * pluma-view: use static variables for cssprovider and settings
  * pluma-view: sync the font in context-menu with gsettings key
  * pluma-window: make sure some resources are freed
  * add the abbility to switch tabs using [ctrl+tab] and [ctrl+shift+tab]
  * pluma-view: Fix font in context menu
  * pluma-view: pluma_override_font: add the provider only one time
  * pluma-view: Fix: Bold and Italic fonts don't work

### pluma 1.21.1

  * Translations update
  * pluma-utils.c: avoid deprecated 'gdk_error_trap_push/pop'
  * pluma-notebook: avoid new file with double click in vertical scrollbar
  * pluma-notebook: avoid new file with double click in forward arrow button
  * pluma-notebook: Fix: unexpected behavior with dnd selected text
  * pluma-view: Fix: unexpected behavior with dnd under line numbers
  * pluma-notebook: pass event to gdk_seat_grab
  * pluma-window: use gtk_menu_popup_at_widget for GtkNotebook
  * pluma-utils: remove unused 'pluma_utils_menu_position_under_tree_view'
  * avoid deprecated 'gtk_menu_popup'
  * pluma-print-preview: Fix weird behavior with mouse buttons
  * Fix: Pluma crashes with mouse wheel over a tab
  * pluma-notebook.c: avoid deprecated 'gdk_pointer_ ...' functions
  * pluma-notebook.c: avoid deprecated 'gdk_window_at_pointer'
  * avoid deprecated 'gtk_dialog_get_action_area'
  * pluma-view.c: avoid deprecated 'gtk_widget_override_font'
  * avoid deprecated 'gtk_font_button_set/get_font_name'
  * pluma-view.c: Fix: GtkCheckMenuItem "Display line numbers" improved
  * pluma-file-browser-widget.c: avoid deprecated GtkImageMenuItem
  * error-message-area: avoid 'gtk_info_bar_new_with_buttons' with stock id
  * avoid 'gtk_info_bar_add_button' with stock ids
  * avoid 'pluma_file_chooser_dialog_new' with stock ids
  * avoid 'gtk_file_chooser_dialog_new' with stock id
  * pluma-time-plugin.c: avoid 'gtk_dialog_new_with_buttons' with stock id
  * avoid 'gtk_dialog_add_buttons' with stock ids

### pluma 1.21.0

  * spell-checker.ui plugin: avoid deprecations
  * sort.ui plugin: avoid deprecations
  * pluma-time-setup-dialog.ui plugin: avoid deprecations
  * pluma-time-dialog.ui plugin: deprecations
  * pluma-spell-setup-dialog.ui plugin: avoid GtkRadioButton:xalign
  * pluma-preferences-dialog.ui: avoid GtkButton:use-stock and GtkImage:stock
  * pluma-encodings-dialog.ui: avoid GtkButton:use-stock
  * externaltools plugin: outputpanel.ui: avoid GtkHBox and GtkVButtonBox
  * spell plugin: languages-dialog.ui: avoid deprecations
  * docinfo.ui plugin: avoid GtkVBox, GtkHBox, GtkLabel:xpad/ypad and GtkTable
  * plugins: docinfo.ui: avoid GtkButton:use-stock and GtkImage:stock
  * spell plugin: pluma-spell-setup-dialog.ui: avoid deprecations
  * python console: config.ui: avoid GtkButton:use-stock
  * Make notebook tabs scrollable
  * avoid deprecated GtkButton:use-stock
  * Fix warning with external tools plugin
  * avoid deprecated GtkStock