Sync docs; update org.tuxpaint.Tuxpaint.appdata.xml.in

Syncing docs to grab version & date updates, MAGIC-API tweak,
and updated quickstart guide.

Update `org.tuxpaint.Tuxpaint.appdata.xml.in` to mention
2- and 3-point perspective, and "complexity" option, too.

Regen. POT & PO files to grab new strings from appdata file.

docs/es_ES.UTF-8/tuxpaint-quickstart-guide.txt

@@ -1,4 +1,4 @@
-Tux Paint 0.9.29 Quickstart Guide
+Tux Paint 0.9.32 Quickstart Guide
 
 Tools (Drawing)
 
@@ -104,12 +104,12 @@ Tools (Drawing)
 🖓Undo
 
   * Use to undo the most recent changes (multiple undo available).
-  * Shortcut: [Ctrl]+[Z]
+  * Shortcut: [Control]+[Z]
 
 🖒Redo
 
   * Use to redo the most recent undone change (multiple redo available).
-  * Shortcut: [Ctrl]+[R]
+  * Shortcut: [Control]+[R]
 
 ◪Eraser
 
@@ -129,7 +129,7 @@ Tools (Controls)
       + Eraser tool ◪ reveals the solid color, or starter/template background.
   * Click/tap "🕮⮫Open" to begin a new drawing.
   * Click/tap "⤺Back" to abort and return to your current drawing.
-  * Shortcut: [Ctrl]+[N]
+  * Shortcut: [Control]+[N]
 
 🕮⮫Open
 
@@ -148,7 +148,7 @@ Tools (Controls)
         your system's "Pictures" folder.
       + Click/tap "⤺Back" to return to the Open dialog.
   * Click/tap "🖻⮫🗏Template" to turn the drawing into a new template.
-  * Shortcut: [Ctrl]+[O]
+  * Shortcut: [Control]+[O]
 
 🕮⮪Save
 
@@ -156,19 +156,19 @@ Tools (Controls)
   * If you've saved previously, you'll be prompted whether to overwrite the
     previously-saved drawing (a la "File→Save") or create a new saved drawing
     (a la "File→Save As...")
-  * Shortcut: [Ctrl]+[S]
+  * Shortcut: [Control]+[S]
 
 🖶Print
 
   * Click/tap to print your drawing.
   * Hold [Alt] or [Option] while clicking/tapping to bring up printer dialog,
     if available.
-  * Shortcut: [Ctrl]+[P]
+  * Shortcut: [Control]+[P]
 
 🗙Quit
 
   * Click/tap to quit Tux Paint.
-  * Shortcut: [Esc]
+  * Shortcut: [Escape]
 
 Colors
 
@@ -176,8 +176,8 @@ Colors
     and Stamps and Magic tools that support colors.
   * Use the pipette / color picker 💉 button to choose a color from a pixel in
     your current drawing.
-      + Shortcut: When colors are available, press [Ctrl] and click/tap in your
-        drawing, to quickly pick a color from your drawing.
+      + Shortcut: When colors are available, press [Control] and click/tap in
+        your drawing, to quickly pick a color from your drawing.
   * Click/tap the rainbow 🌈 button to choose a arbitrary color.
       + Click/tap in the rainbow square to pick a color (hue and saturation).
       + Click/tap in the grey gradient bar to adjust brightness (value).
@@ -196,16 +196,16 @@ Colors
 
 Shortcuts while drawing:
 
-  * [Ctrl]+Click/tap - Quick pipette / color picker 💉 access
+  * [Control]+Click/tap - Quick pipette / color picker 💉 access
   * [X]+Click/tap - Quick eraser ◪ access
-  * [Ctrl]+[Z] - 🖓Undo
-  * [Ctrl]+[R] - 🖒Redo
-  * [Ctrl]+[N] - 🗏New
-  * [Ctrl]+[O] - 🕮⮫Open
-  * [Ctrl]+[S] - 🕮⮪Save
-  * [Ctrl]+[P] - 🖶Print
+  * [Control]+[Z] - 🖓Undo
+  * [Control]+[R] - 🖒Redo
+  * [Control]+[N] - 🗏New
+  * [Control]+[O] - 🕮⮫Open
+  * [Control]+[S] - 🕮⮪Save
+  * [Control]+[P] - 🖶Print
   * [Alt]+[S] - Toggle sound effects on/off
-  * [Esc] - ⤺Back or 🗙Quit
+  * [Escape] - ⤺Back or 🗙Quit
 
-Last updated: julio 19, 2023
+Last updated: enero 1, 2024