Add QtWebView online repository collection file

Change-Id: Ia08ab5662cac566eda22cbeb291d7e8942c49efd
Reviewed-by: Antti Kokko <antti.kokko@digia.com>
Disable winrt/winphone packages by default

Do only enable msvc_2013_winphone_arm, msvc_2013_winphone_x86 and
msvc2013_winrt_x86 packages by default, and hide them completely if
the Windows is 32 bit.

Task-number: QTBUG-37769
Change-Id: Icdbe42e86024652d2e1d66e29a96c4ea5dce1b2c
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@theqtcompany.com>
Reviewed-by: Andrew Knight <andrew.knight@theqtcompany.com>
Reviewed-by: Iikka Eklund <iikka.eklund@theqtcompany.com>