add stop clock control features in modal

[manojbalaji1]

PR for IssueID: #18

Added Sto-watch options in popup modal of notes

[1995YogeshSharma]

Hi, this is not functionally correct as of now.
Two of the bugs I could see was ->

• when you add a stopwatch, it is in 'pause mode' and control button also shows option to 'pause' which is not the case in the code before your commit.
• Switch any clock to modal view and toggle it's mode (say from pause to play). Now when you cross modal the watch reflects the toggled state in modal but the button in main mode doesn't.

[1995YogeshSharma]

Please make these changes and I'll remove the 'draft' label immediately.