First Danish translation of the Monero GUI

Added danish

Added danish translation

Added linkup to Danish flag

</languages> corrected to new line

Accidently put it behind danish translation, so it wouldn't keep formatting.

Removed blank lines + changed wallet-lan to English

Uploaded Danish flag

Delete dk.png not ideal size

Uploaded denmark.png 100x100

Fixed a typo

</message> wasnt closed

Removed some spaces

Fixed punctuations.

edit punctuation after github's bug

Fixed typo

monero-wallet-gui.pro

@@ -317,6 +317,7 @@ TRANSLATIONS =  \ # English is default language, no explicit translation file
                 $$PWD/translations/monero-core_he.ts \ # Hebrew
                 $$PWD/translations/monero-core_ko.ts \ # Korean
                 $$PWD/translations/monero-core_ro.ts \ # Romanian
+                $$PWD/translations/monero-core_da.ts \ # Danish
 
 CONFIG(release, debug|release) {
     DESTDIR = release/bin