PIE: option for Pie to maintain its position, disregarding orientation changes (useful for gaming)

Change-Id: I2bde8ee6f6fdff602a1241d4da7fd88ed3216477
allow widgets to minimize in extended desktop

Change-Id: I666f61644386ff10631185324f445a750571b104
derp

Change-Id: I83441eb7dbd8daedde5bdf4247d4b5445a8886c0
PIE: narrow down inner arcs for even gaps

Change-Id: I92122efa1e2571b5f4efc84bbb9833987846dbd0