Improve search and display in the editor property/method selector
Improve search and display in the editor property/method selector

- Use postfix notation for types in the method selector
  (for consistency with the editor help).
- Perform a case-insensitive match and replace spaces with underscores
  in the search string.
- Fix extraneous space after the `void` return type.

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