Follow up to MR 126

Fill settings-default.cfg with default values as RGBA values are not intuitive for end users.
Add a boolean setting to enable the formatting (disabled by default).

apps/openmw/mwgui/dialogue.cpp

@@ -737,6 +737,9 @@ namespace MWGui
 
     void DialogueWindow::updateTopicFormat()
     {
+        if (!Settings::Manager::getBool("color topic enable", "GUI"))
+            return;
+
         std::string specialColour = Settings::Manager::getString("color topic specific", "GUI");
         std::string oldColour = Settings::Manager::getString("color topic exhausted", "GUI");
 

docs/source/reference/modding/settings/GUI.rst

@@ -141,6 +141,15 @@ This setting can only be configured by editing the settings configuration file.
 This setting has no effect if the crosshair setting in the HUD Settings Section is false.
 This setting has no effect if the show owned setting in the Game Settings Section is false.
 
+color topic enable
+------------------
+
+:Type:      boolean
+:Range:		True/False
+:Default:	False
+
+Control wether additionnal formatting will be applied to dialogs topic. See 'color topic specific' and 'color topic exhausted' for details.
+
 color topic specific
 --------------------
 

files/settings-default.cfg

@@ -202,13 +202,18 @@ color crosshair owned = 1.0 0.15 0.15 1.0
 # Controls whether Arrow keys, Movement keys, Tab/Shift-Tab and Spacebar/Enter/Activate may be used to navigate GUI buttons.
 keyboard navigation = true
 
+# Apply the defined color to dialogue topic.
+color topic enable = false
+
 # The color of dialogue topic keywords that gives unique actor responses
-# Format R G B A or empty for default
+# Format R G B A or empty for no special formatting
-color topic specific =
+# Default to blue
+color topic specific = 0.45 0.5 0.8 1
 
 # The color of dialogue topic keywords that gives already read responses
-# Format R G B A or empty for default
+# Format R G B A or empty for no special formatting
-color topic exhausted =
+# Default to grey
+color topic exhausted = 0.3 0.3 0.3 1
 
 [HUD]