Merge changes from origin/7.1

da0a112 Merge changes from origin/7.0
6ba8938 Restore legacyPropertyToString value parsing logic (#11970)
d5c0ffa Fix NPE when converting null values (#11895)
2aa3096 Avoid string casing problems (#11970)
0f107f3 Update widgetset template (#12053)
eb64fda Add support for rem units (#11279)
5f66766 Using StringTokenizer instead of String.split() in AbstractComponent (#8759)
15b217d Handle push disconnections and reconnections more reliably (#11831, #11922)
47addab Adding isIOs and isAndroid to the WebBrowser wrapper around VBrowserDetails (#11168)
0aa5907 Do not write 404 as a response to all action/event requests (#12056)
55ebe13 Detach and attach when adding or removing the caption wrapper (#11708)
7830af2 Fix GridLayout resize after removing caption (#12011)
53e3a25 DebugWindow resize/move improved, fixes #11937 (also implements shift-resize and alt-move, improves bounds-check)
f2b2ce9 Updated to Smartsprites 0.2.10 (#12069)
29c9b60 SimpleTree styling changed for #12058
da8382d DebugWindow now remembers open tab/section, InfoSection fixed to support being opened at once, for #12058
4f5bcef Info tab is now tab 1, hierarchy tab 2
a089743 Consistently recover from disconnections in IE (#12073)
59103a9 Always notify parent of enable state changes (#12062)
997e9a9 Fixed test issue apparently caused by three levels of classes
54ffbdb Add missing license header

Change-Id: Ifba747964fa0d8265bb468ca555b84dadec9fa0a