Datepicker: Corrections for Swedish localization

Months and weekdays should be in small caps in Swedish.
https://sv.wikipedia.org/wiki/Versalisering

Fixes #15142
Closes gh-1799

ui/i18n/datepicker-sv.js

@@ -17,13 +17,13 @@ datepicker.regional.sv = {
 	prevText: "«Förra",
 	nextText: "Nästa»",
 	currentText: "Idag",
-	monthNames: [ "Januari","Februari","Mars","April","Maj","Juni",
-	"Juli","Augusti","September","Oktober","November","December" ],
-	monthNamesShort: [ "Jan","Feb","Mar","Apr","Maj","Jun",
-	"Jul","Aug","Sep","Okt","Nov","Dec" ],
-	dayNamesShort: [ "Sön","Mån","Tis","Ons","Tor","Fre","Lör" ],
-	dayNames: [ "Söndag","Måndag","Tisdag","Onsdag","Torsdag","Fredag","Lördag" ],
-	dayNamesMin: [ "Sö","Må","Ti","On","To","Fr","Lö" ],
+	monthNames: [ "januari","februari","mars","april","maj","juni",
+	"juli","augusti","september","oktober","november","december" ],
+	monthNamesShort: [ "jan.","feb.","mars","apr.","maj","juni",
+	"juli","aug.","sep.","okt.","nov.","dec." ],
+	dayNamesShort: [ "sön","mån","tis","ons","tor","fre","lör" ],
+	dayNames: [ "söndag","måndag","tisdag","onsdag","torsdag","fredag","lördag" ],
+	dayNamesMin: [ "sö","må","ti","on","to","fr","lö" ],
 	weekHeader: "Ve",
 	dateFormat: "yy-mm-dd",
 	firstDay: 1,