Ghostwriter: fix supported filetypes

Ghostwriter is a text editor, it doesn't open images...
Improved summary and description.

app-text/ghostwriter/additional-files/ghostwriter.rdef.in

@@ -5,18 +5,18 @@ resource app_version {
 	major  = @MAJOR@,
 	middle = @MIDDLE@,
 	minor  = @MINOR@,
-	
+
 	variety = B_APPV_FINAL,
 	internal = 0,
-	
-	short_info = "ghostwriter",
+
+	short_info = "Ghostwriter",
 	long_info = "@LONG_INFO@"
 };
 
 resource app_signature "@APP_SIGNATURE@";
 
 resource file_types message {
-	"types" = "image"
+	"types" = "text"
 };
 
 resource vector_icon {

app-text/ghostwriter/ghostwriter-1.7.4.recipe

@@ -1,9 +1,22 @@
-SUMMARY="A cross-platform, aesthetic, distraction-free Markdown editor"
-DESCRIPTION="ghostwriter is a text editor for Markdown."
+SUMMARY="A Markdown editor with no distractions"
+DESCRIPTION="Ghostwriter is a text editor for Markdown that tries to stay out of your way.
+Main features:
+
+* Optional live HTML preview
+* Drag and drop of images
+* Copy as HTML to clipboard
+* Export HTML
+* Auto-save
+* A 'distraction-free mode' to focus on the current sentence/paragraph
+* Customizable color themes
+* Custom style sheets
+* Outline window to quickly jump to headings
+* Markdown cheat sheet
+* Document and session statistics"
 HOMEPAGE="https://wereturtle.github.io/ghostwriter/"
 COPYRIGHT="wereturtle et al."
 LICENSE="GNU GPL v3"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="https://github.com/wereturtle/ghostwriter/archive/v$portVersion.tar.gz"
 CHECKSUM_SHA256="4987126e71a37556e575fbce2002c5504cf15a04c11bcce604a278f59ec9c11a"
 SOURCE_FILENAME="ghostwriter-$portVersion.tar.gz"