[Qt] update bitcoin-qt.pro and assets-attribution.md

- remove unused and unmentioned file notsynced.png (we use an animation
  for this)
- add missing coincontroldialog.ui to bitcoin-qt.pro
- also unify formating in assets-attribution.md

contrib/bitcoin-qt.pro

@@ -1,19 +1,20 @@
 FORMS += \
-    ../src/qt/forms/transactiondescdialog.ui \
-    ../src/qt/forms/signverifymessagedialog.ui \
-    ../src/qt/forms/sendcoinsentry.ui \
-    ../src/qt/forms/sendcoinsdialog.ui \
-    ../src/qt/forms/rpcconsole.ui \
-    ../src/qt/forms/overviewpage.ui \
-    ../src/qt/forms/optionsdialog.ui \
-    ../src/qt/forms/intro.ui \
-    ../src/qt/forms/editaddressdialog.ui \
-    ../src/qt/forms/askpassphrasedialog.ui \
-    ../src/qt/forms/addressbookpage.ui \
     ../src/qt/forms/aboutdialog.ui \
+    ../src/qt/forms/addressbookpage.ui \
+    ../src/qt/forms/askpassphrasedialog.ui \
+    ../src/qt/forms/coincontroldialog.ui \
+    ../src/qt/forms/editaddressdialog.ui \
+    ../src/qt/forms/intro.ui \
+    ../src/qt/forms/openuridialog.ui \
+    ../src/qt/forms/optionsdialog.ui \
+    ../src/qt/forms/overviewpage.ui \
     ../src/qt/forms/receivecoinsdialog.ui \
     ../src/qt/forms/receiverequestdialog.ui \
-    ../src/qt/forms/openuridialog.ui
+    ../src/qt/forms/rpcconsole.ui \
+    ../src/qt/forms/sendcoinsdialog.ui \
+    ../src/qt/forms/sendcoinsentry.ui \
+    ../src/qt/forms/signverifymessagedialog.ui \
+    ../src/qt/forms/transactiondescdialog.ui \
 
 RESOURCES += \
     ../src/qt/bitcoin.qrc