more understandable prompt to save

rsrc/dialogs/save-before-launch.xml

@@ -1,11 +1,11 @@
 <?xml version='1.0' encoding='UTF-8' standalone='no'?>
 <?xml-stylesheet href="dialog.xsl" type="text/xsl"?>
 <dialog defbtn='save'>
-	<button name='save' type='regular' top='43' left='240'>Save</button>
+	<button name='save' type='regular' top='43' left='240'>OK</button>
 	<button name='cancel' type='regular' def-key='esc' top='43' left='175'>Cancel</button>
-	<button name='revert' type='regular' top='43' left='109'>Don't</button>
+	<button name='revert' type='regular' top='43' left='109'></button>
 	<pict type='dlog' num='16' top='6' left='6'/>
 	<text top='6' left='49' width='256' height='32'>
-		Save changes to your scenario before launching it?
+		Your scenario will be saved before launching.
 	</text>
 </dialog>

src/scenedit/scen.actions.cpp

@@ -2661,12 +2661,16 @@ void start_dialogue_editing(short restoring) {
 	redraw_screen();
 }
 
-bool save_check(std::string which_dlog) {
+bool save_check(std::string which_dlog, bool allow_no) {
 	std::string choice;
 	
 	if(!change_made)
 		return true;
-	choice = cChoiceDlog(which_dlog, {"save","revert","cancel"}).show();
+	cChoiceDlog dlog(which_dlog, {"save","revert","cancel"});
+	if(!allow_no){
+		dlog->getControl("revert").hide();
+	}
+	choice = dlog.show();
 	if(choice == "revert")
 		return true;
 	else if(choice == "cancel")

src/scenedit/scen.actions.hpp

@@ -44,7 +44,7 @@ void update_mouse_spot(location the_point);
 bool monst_on_space(location loc,short m_num);
 void place_edit_special(location loc);
 void set_special(location spot_hit);
-bool save_check(std::string which_dlog);
+bool save_check(std::string which_dlog, bool allow_no = true);
 
 /// Represents the action of adding a new town to the end of the list
 class aNewTown : public cAction {

src/scenedit/scen.main.cpp

@@ -108,7 +108,7 @@ void launch_scenario() {
 	}
 
 	// Prompt to save first
-	if(!save_check("save-before-launch")) return;
+	if(!save_check("save-before-launch", false)) return;
 
 	fs::path game_binary;
 #ifdef SFML_SYSTEM_MACOS