T Panel: Revert hint text color to same gray as elsewhere

Author: ohlidalp

source/main/gui/panels/GUI_VehicleInfoTPanel.h

@@ -54,7 +54,7 @@ class VehicleInfoTPanel
     Ogre::Timer m_startupdemo_timer;
     bool m_startupdemo_init = false;
     ImVec4 m_panel_translucent_color = ImVec4(0.1f, 0.1f, 0.1f, 0.5f);
-    ImVec4 m_transluc_textdis_color = ImVec4(0.05f, 0.05f, 0.05f, 1.f);
+    ImVec4 m_transluc_textdis_color = ImVec4(0.64f, 0.64f, 0.63f, 1.f);
     /// @}
 
     /// @name 'Vehicle commands' tab