Allow flashing of images via the GUI

- Use the Images... button in the lower right of the zip install
  page
- Unify image flashing functions between restore and image flash
- boot and recovery partitions are flashable by default
- use fstab flag flashimg=1 or 0 to override defaults
- file system partitions are currently not flashable

Change-Id: I822dc446030543c55d2153e219d67a1292374ffc
diff --git a/gui/partitionlist.cpp b/gui/partitionlist.cpp
index 9cc6a77..3ec1548 100644
--- a/gui/partitionlist.cpp
+++ b/gui/partitionlist.cpp
@@ -793,6 +793,10 @@
 						DataManager::SetValue(mVariable, str);
 					}
 				} else {
+					if (ListType == "flashimg") { // only one item can be selected for flashing images
+						for (int i=0; i<listSize; i++)
+							mList.at(i).selected = 0;
+					}
 					if (mList.at(actualSelection).selected)
 						mList.at(actualSelection).selected = 0;
 					else