[GSoC] Review of Sidebar & It's functionality - Weekly Report #2

Hi,

The second week of GSoC is over, and this is what I've done from last week:

1. Writer Page Tab:
a) Format Panel - Merged (https://gerrit.libreoffice.org/#/c/25530/)
b) Margin Panel - On gerrit, to be modified. (
https://gerrit.libreoffice.org/#/c/25520/)
c) Styles Panel - Column Count, Page Number Format, and Layout done.
d) Header/Footer Panel - Was stuck with SIDs for Header Footer in Writer.
Would go ahead with multiple SIDs (if no better solution comes up). Wasn't
able to finish up the deck due to this bottleneck.

TO-DO:
1. Finish Background Fill in Styles Panel, and Header/Footer Panels.
2. Start fixing Area Content Panel once the Writer Page Deck is done.

Regards,
Susobhan Ghosh
IRC: susobhang70