Manual: Delete another three duplicated and unused files. Fix one filename.

Change-Id: Ice3ecc9db6202e3eb6dca23a156b7d9344b6973d
diff --git a/manual/plugins/images/ss-equalizer-240x400x16.png b/manual/plugins/images/ss-equalizer-240x400x16.png
deleted file mode 100644
index b022389..0000000
--- a/manual/plugins/images/ss-equalizer-240x400x16.png
+++ /dev/null
Binary files differ
diff --git a/manual/plugins/images/ss-generalsettings-240x400x16.png b/manual/plugins/images/ss-generalsettings-240x400x16.png
deleted file mode 100644
index a648172..0000000
--- a/manual/plugins/images/ss-generalsettings-240x400x16.png
+++ /dev/null
Binary files differ
diff --git a/manual/plugins/images/ss-mainmenu-240x400x16.png b/manual/plugins/images/ss-mainmenu-240x400x16.png
deleted file mode 100644
index 6019a55..0000000
--- a/manual/plugins/images/ss-mainmenu-240x400x16.png
+++ /dev/null
Binary files differ
diff --git a/manual/plugins/images/ss-textviewer-240x400x16.png b/manual/plugins/images/ss-text_viewer-main-240x400x16.png
similarity index 100%
rename from manual/plugins/images/ss-textviewer-240x400x16.png
rename to manual/plugins/images/ss-text_viewer-main-240x400x16.png
Binary files differ