Fixes and improvements for announcement management and display.
Fixes and improvements for announcement management and display.

okornev/oneops,oneops/display,lkhusid/display,lkhusid/oneops,lkhusid/oneops,okornev/oneops,bannama/display,gauravlall/oneops,lkhusid/display,gauravlall/oneops,lkhusid/oneops,okornev/oneops,bannama/display,okornev/oneops,oneops/display,gauravlall/oneops,lkhusid/display,lkhusid/oneops,lkhusid/oneops,gauravlall/oneops,okornev/oneops,oneops/display,gauravlall/oneops,lkhusid/oneops,bannama/display,gauravlall/oneops,okornev/oneops