[DF-1282] Removed texture scan/reconvert from mainscreen reload action.
[DF-1202] New property panel for texture browser is ready.
[DF-1256] More improvements to propertyeditor allowed values.

Added timeout for properties refresh
Added signal emited, when property flags changed
Added aliases for property data
Merge branch 'development' of https://github.com/dava/dava.framework into development