implement loading docking windows from .ui format

Change-Id: I90375232aefbe40412614ca0f30ba467cf393f2e
relax assert, 0 is fine

Change-Id: I176a79bce85fa81310a53fcfecc6e0bc63f0ae18
map gtk-media-stop to SymbolType::STOP

Change-Id: Iffdc04464bd70ca70684f28e6d6e23a054bfc8a7
convert docking animation window to .ui

Change-Id: I2633173bb21da554f55b244d6d2947567c933c2a
silence parent-less warning for temp images from builder

Change-Id: I3efcac58f7a6629ae2615e29ea564e583414479c
try to get reasonable sizes for docking windows

start docked, move to undocked
start undocked, move to dock, back to undocked
start undocked, with and without size saved in settings and restored

Change-Id: I0bfdceb11aabdf9fdb855b97433b2af0532e4d03
allow NULL SfxChildWindow

Change-Id: I841b9b3f74a9822fe8c477a280bbe2f4904ed64c
RID_CMDBOXWINDOW is so hacky and src entry so small just hardcode in cxx

Change-Id: I63e97e91792fcf2bf8758a1444bb29e3c1ccd541
not worth converting RID_SVXCTRL_COLOR to .ui, too small and hard-coded

Change-Id: Iadc7b4d970e8c3b7f719ed6aab49986a1186cccb
unused RID_SVX_FMEXPLORER DockingWindow resource

Change-Id: Ib8f0f86a30342ca455a92c9add5b2836fa40f8f4