Replace R.string.yes with R.string.ok

Android doesn't use yes/no but ok/cancel usually, so this should be done here, too

app/src/main/res/values-he/strings.xml

@@ -58,7 +58,6 @@
     <string name="downloads_title">הורדות</string>
     <string name="error_report_title">דוח שגיאה</string>
     <string name="all">הכול</string>
-    <string name="yes">כן</string>
     <string name="disabled">מושבת</string>
     <string name="clear">ניקוי</string>
     <string name="general_error">שגיאה</string>