Improve the editor window title for better usability
Improve the editor window title for better usability

- Display the scene name, then the project name, then "Godot Engine".
- Display the "modified" mark before anytihng else.

Both of these changes ensure important, project-specific elements
can always be seen in the task bar which may truncate strings due to
its low per-item width.

- Use "Unnamed Project" if the project has no name (similar to the
  Project Manager).

akien-mga/godot,Valentactive/godot,Zylann/godot,guilhermefelipecgs/godot,vkbsb/godot,DmitriySalnikov/godot,godotengine/godot,pkowal1982/godot,guilhermefelipecgs/godot,Faless/godot,ZuBsPaCe/godot,ZuBsPaCe/godot,josempans/godot,Shockblast/godot,godotengine/godot,Faless/godot,akien-mga/godot,Shockblast/godot,BastiaanOlij/godot,vnen/godot,Valentactive/godot,guilhermefelipecgs/godot,Shockblast/godot,Shockblast/godot,pkowal1982/godot,Valentactive/godot,DmitriySalnikov/godot,Valentactive/godot,Zylann/godot,josempans/godot,Zylann/godot,sanikoyes/godot,firefly2442/godot,ZuBsPaCe/godot,Faless/godot,Shockblast/godot,akien-mga/godot,pkowal1982/godot,Shockblast/godot,Valentactive/godot,godotengine/godot,vkbsb/godot,firefly2442/godot,Zylann/godot,Zylann/godot,DmitriySalnikov/godot,Faless/godot,DmitriySalnikov/godot,vkbsb/godot,firefly2442/godot,pkowal1982/godot,Valentactive/godot,vkbsb/godot,firefly2442/godot,josempans/godot,sanikoyes/godot,vnen/godot,godotengine/godot,akien-mga/godot,Zylann/godot,guilhermefelipecgs/godot,godotengine/godot,guilhermefelipecgs/godot,Shockblast/godot,josempans/godot,BastiaanOlij/godot,BastiaanOlij/godot,Faless/godot,vnen/godot,pkowal1982/godot,vnen/godot,josempans/godot,DmitriySalnikov/godot,Valentactive/godot,ZuBsPaCe/godot,DmitriySalnikov/godot,pkowal1982/godot,vkbsb/godot,akien-mga/godot,sanikoyes/godot,sanikoyes/godot,vnen/godot,vkbsb/godot,sanikoyes/godot,godotengine/godot,BastiaanOlij/godot,DmitriySalnikov/godot,Faless/godot,josempans/godot,vkbsb/godot,josempans/godot,Shockblast/godot,firefly2442/godot,firefly2442/godot,ZuBsPaCe/godot,akien-mga/godot,vkbsb/godot,Faless/godot,guilhermefelipecgs/godot,josempans/godot,firefly2442/godot,godotengine/godot,pkowal1982/godot,akien-mga/godot,guilhermefelipecgs/godot,vnen/godot,ZuBsPaCe/godot,sanikoyes/godot,BastiaanOlij/godot,ZuBsPaCe/godot,firefly2442/godot,akien-mga/godot,vnen/godot,Faless/godot,vnen/godot,BastiaanOlij/godot,BastiaanOlij/godot,sanikoyes/godot,pkowal1982/godot,sanikoyes/godot,Zylann/godot,BastiaanOlij/godot,Zylann/godot,guilhermefelipecgs/godot,ZuBsPaCe/godot,godotengine/godot,Valentactive/godot