Implement the new design for the Progress Bar

Wanted to make a padding of a different color for the progress bar, but
for right I decided to stick with the same color for the padding, because
when the value bar gets too small - it goes over the bacgkround since
everything has 20 dp corners - and it messes up everything. Will fix this
in later versions.

- Make the text larger within the progress bar.
- Make the progress bar corners round by adding drawables and setting them
  as a background for the value bar and the progress bar itself.
- Add padding to the progress bar.
- Make appropriate changes to the layout to center everything.
- Connect the monthly budget overdraft button with the onClickListener
  that calls the raiseMonthlyBudgetDialog.