Support for Disable Send policy

[mpbw2]

Overview

Added support for disabling Send via enterprise policy. Functionality is reduced to read and delete only.

(Note that references to "options button" below is referring to the 3-dot overflow for each item in listviews, not the new expandable options button on the Send Add/Edit page)

Files Changes/Added

Android:

• SendviewCellRenderer.cs: Support for toggling options button visibility, added missing disabled send icon
• SendViewCell.axml: Added missing disabled send icon

App:

• SendviewCell.xaml: Support for toggling options button visibility
• SendViewCell.xaml.cs: Support for toggling options button visibility
• SendViewCellViewModel.cs: Support for toggling options button visibility
• SendGroupingsPage.xaml: Support for toggling options button visibility, warning banner, and FAB visibility for Android
• SendGroupingsPage.xaml.cs: Added call to init viewmodel and post-load toolbar adjustments
• SendGroupingsPageViewModel.cs: Added SendEnabled property, set via new init method, and passed into sends list
• SendGroupingsPageListItem.cs: Added property for options button visibility
• SendAddEditPage.xaml: Support for disabling save button, warning banner, and bindings to disable editable components when Send is disabled
• SendAddEditPage.xaml.cs: Moved call to init to async, post-load toolbar adjustments, and adjustments to the "More" overflow menu based on SendEnabled (also tweaked button size for android hack and added missing "Async" suffix to "TypeChanged" method)
• SendAddEditPageViewModel.cs: Added SendEnabled property, made init method async, added SendEnabled check failsafe to SubmitAsync, use CopySendUrlAsync helper method, added missing Async suffix to ShareSendUrl
• SendsPage.xaml: Support for toggling options button visibility
• SendsPageViewModel.cs: Added SendEnabled property
• AppResources.resx: Added SendLink and SendDisabledWarning text
• AppResources.Designer.cs: System modified resources
• AppHelpers.cs: Added IsSendDisabledByPolicyAsync and CopySendUrlAsync helper methods, and added IsSendDisabledByPolicyAsync failsafe checks to ShareSendUrlAsync and RemoveSendPasswordAsync

Core:

• PolicyType.cs: Added DisableSend policy type

Considerations

• Warning banner design is based on pattern already established elsewhere (password generator policies come to mind)
• Some views lack an obvious "disabled" state change and it varies by platform. it's something I hope to improve upon with styling & XF updates

Screenshots