This update for seamonkey fixes the following issues:

Seamonkey requested to be included in Leap 15.1 and 15.2:

  https://bugzilla.opensuse.org/show_bug.cgi?id=1174300

update appdata files (Bug 1174192):

  * correct metadata licensing information (most of the application
    descriptions had been taken from
    https://www.seamonkey-project.org/doc/features which according to
    the page footer is licensed under CC-BY-SA-3.0)
  * update the metadata summary and the introduction in the metadata
    description to more accurately reflect what SeaMonkey is, giving
    less prominence to the long-discontinued Mozilla Application Suite
    that many users may no longer be familiar with
  * update the metadata name to more accurately reflect the name
    or purpose of the application
  * update the metadata URL with the current SeaMonkey website

update to SeaMonkey 2.53.3

  * The LaTex tool TexZilla, used for inserting Math, has been
    upgraded to 1.0.2.
  * It is now possible to customize the toolbars in Composer and the
    formatting toolbar in Mailnews composition.
  * All folders of an account can now be marked as read.
  * There is now an option for not advertizing SeaMonkey at all in the
    user agent.
  * The preference for hiding the toolbar and menubar grippies can now
    be changed from "Preferences->Appearance".
  * The preference "browser.tabs.autoHide" which autohides the tab bar
    when there is only one tab in a browser window open has been
    flipped in bug 1634879. SeaMonkey will now show the tab bar as the
    default. You can change it back by checking "Hide the tab bar when
    only one tab is open" in "Preferences->Browser->Tabbed Browsing"
  * Update of help page content and links.
  * SeaMonkey language packs are now version specific and will be
    disabled as part of the profile upgrade following the installation
    of a later version.
  * Search Engines have been centralized and updated in bug 1300198.
  * Address book now has updated IM fields, improved layout for card
    view pane, improved multi-word search, ability to search across
    multiple address books, more granular prompts when deleting items,
    print on the context menus and print button on the toolbar.
  * Multimedia support has been updated in preparation of supporting
    more audio video formats in the next releases. For enhanced
    security the Rust multimedia parser is now used for this and the
    libstagefright package has been removed.
  * SeaMonkey 2.53.3 uses the same backend as Firefox and contains the
    relevant Firefox 60.4 security fixes.
  * SeaMonkey 2.53.3 shares most parts of the mail and news code with
    Thunderbird. Please read the Thunderbird 60.0 release notes for
    specific changes and security fixes in this release.
  * Additional important security fixes up to Current Firefox 77 and a
    few enhancements have been backported.

This update was imported from the openSUSE:Leap:15.2:Update update project.