[polari] (15 commits) Non-fast-forward update to branch wip/fmuellner/window-experiments

[Florian Müllner <fmuellner src gnome org>]

The branch 'wip/fmuellner/window-experiments' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  76dc707... mainWindow: Manage active room via an :active-room property
  71293f2... roomStack: Initialize active room and sensitivity
  eb9cb19... roomList: Handle accounts immediately when already prepared
  b148b67... chatroomManager: Add forEachRoom()
  a4bf333... roomList: Use Map to keep track of rows/placeholders
  127b54d... roomList: Pick up list of existing rooms
  66dcb75... roomStack: Store rooms in a Map
  609109d... roomStack: Pick up list of existing rooms
  272c489... app: Implement 'new-window' action
  c8cd2fb... mainWindow: Add a convenience :active-room-id property
  7be4d61... mainWindow: Add construct-only :single-room property
  9dce7d6... roomList: Add "Open in Window" to context menu
  eefe073... Some more single-room fixes

Commits added to the branch:

  f6b6903... mainWindow: Manage active room via an :active-room property
  dd3b7ec... roomStack: Initialize active room and sensitivity
  c40364b... roomList: Handle accounts immediately when already prepared
  5ebed7c... chatroomManager: Add forEachRoom()
  eb7fdca... roomList: Use Map to keep track of rows/placeholders
  dba53c9... roomList: Pick up list of existing rooms
  45c691f... roomStack: Store rooms in a Map
  f94006f... roomStack: Pick up list of existing rooms
  e678db9... app: Implement 'new-window' action
  c597d8f... mainWindow: Add a convenience :active-room-id property
  3ac0c0f... mainWindow: Add construct-only :single-room property
  5ebab79... roomList: Add "Open in Window" to context menu
  586ff92... Some more single-room fixes
  e1d97f9... mainWindow: Hide left headerbar when in single-room mode
  42796e9... roomList: Detach rooms that are shown in their own window