startcenter: Smaller frame around the entire start center area (6 -> 1px).

Based on Mirek's suggestion; looks better.

Change-Id: I3468450ee4c8ba27cd26a40c7ed11f0b4df9c42d
Expert config: Introduce configuration key to disable expert config.

It is /org.openoffice.Office.Common/Security/EnableExpertConfiguration with
values true/false; defaults to true.

Change-Id: I5a18d16182c28a13169677b11f68884f34c11c63
Expert config: 6px between lines + center the button.

Change-Id: I91899493479eb60c955dac3891a38913ad871376
template view: Simplify code.

Change-Id: I48fc6fa86a9953db87e59a83714d4d7b0ff8d64a
startcenter: Bigger & nicer document icons for recent documents.

Change-Id: If61aefc1d27d7bca2e8242b404db685a503bcf0e
startcenter: Make the default icons appear as on a piece of paper.

So that the frame around the picture is similar to the previews; otherwise
looks disturbing.

Change-Id: Ie7f973e15c29a34c0f368b5e0f5a152d5cead39f
startcenter: Full thumbnail size (256px), upscale if necessary.

Change-Id: I8ae72249853a03b1dfca0ecd10eef47e9aa7cbfe
Small cleanup of initialization.

Change-Id: I62c0479414ab6748039498e1bc2b3bc9d7c4ef05
fdo#72650: Get thumbnails only from the local documents.

No point in connecting to eg. ftp to get a thumbnail ;-)

Change-Id: I017c59196c294242366f2254eeacd9056455c1bc
startcenter: Implement mouse over effect.

Change-Id: I9beea6119dbb1c12ff053e5776f15d40a3389a8b
startcenter: Tooltip should show the full URL.

Change-Id: Ia8e071ebe00fb8c72973614077e778aef55fb1ab