Playground: Rename the application to GMLPlayground

Just "Playground" is too generic and doesn't match the general rule of
"application name equals display name minus spaces".

Base/home/anon/.config/LaunchServer.ini

@@ -19,7 +19,7 @@ txt=/bin/TextEditor
 font=/bin/FontEditor
 sheets=/bin/Spreadsheet
 csv=/bin/Spreadsheet
-gml=/bin/Playground
+gml=/bin/GMLPlayground
 pdf=/bin/PDFViewer
 profile=/bin/Profiler
 pp=/bin/PixelPaint

Base/res/apps/GMLPlayground.af

@@ -1,6 +1,6 @@
 [App]
 Name=GML Playground
-Executable=/bin/Playground
+Executable=/bin/GMLPlayground
 Category=Development
 
 [Launcher]

Base/usr/share/man/man1/GMLPlayground.md

@@ -1,13 +1,13 @@
 ## Name
 
-![Icon](/res/icons/16x16/app-playground.png) Playground - GUI Markup Language (GML) editor
+![Icon](/res/icons/16x16/app-gml-playground.png) GML Playground - GUI Markup Language (GML) editor
 
-[Open](file:///bin/Playground)
+[Open](file:///bin/GMLPlayground)
 
 ## Synopsis
 
 ```**sh
-$ Playground [file]
+$ GMLPlayground [file]
 ```
 
 ## Arguments
@@ -16,7 +16,7 @@ $ Playground [file]
 
 ## Description
 
-Playground facilitates development of graphical user interfaces (GUI)
+GML Playground facilitates development of graphical user interfaces (GUI)
 for Serenity applications using GUI Markup Language (GML) to compose
 a layout for GUI widgets and set widget attributes.
 
@@ -26,7 +26,7 @@ window, allowing rapid prototyping and development of application GUIs.
 ## Examples
 
 ```sh
-$ Playground /home/anon/example.gml
+$ GMLPlayground /home/anon/example.gml
 ```
 
 ## See also

Base/usr/share/man/man5/GML-Introduction.md

@@ -19,7 +19,7 @@ Or right clicking on a folder in the TreeView and using
 ## See also
 
 -   [gml-format(1)](help://man/1/gml-format) formats your GML files.
--   [GML Playground(1)](help://man/1/Playground) is an interactive GML creation tool.
+-   [GML Playground(1)](help://man/1/GMLPlayground) is an interactive GML creation tool.
 
 ### List of GML manpages