Page header on Dashboard Page UI

[elsatamara]

Todo:

• [x] Change PageHeader component into:

  

• [x] Calendar drop down menu

• [x] Alert type filter

• [x] More filters on click should pop up a new row, with all the dropdown menus and reset all filters button

• [x] Flagged patterns TBD

Create custom filter (under saved filter dropdown menu):

• [x] Create new button will pop up a window to create custom filter

Functionality is coded on #15

[elsatamara]

More issues on filter dropdown UI is being addressed on #29

[elsatamara]

This issue is too big, Saved filter dropdown is being moved to #31