Icon redux 01: Remove old dbaccess icons

i#87893 Porting old icon fixes from AOO Bugzilla.
Removed outdated icons. Lossless compression of remaining png files.

Checked against resources deleted from ImageLists in 'dbaccess/ui/inc/browserids.hxx' circa 2004. Took a conservative approach; the following can probably be removed in future, as defined in browserids.hxx but possibly not used:
- lc014.png
- lc021.png
- lc023.png
- queryeditdesign_sc.png
- queryeditsql_sc.png
- sc014.png
- sc021.png
- sc023.png

QA - Recommend visual inspection of database icons, using different themes.

Change-Id: I5c388d0a94c48fa4287282e5171e78ca293c29e2
Signed-off-by: Andrew <dent.ace@gmail.com>
images: Skip comments in links.txt.

Change-Id: I446dec8447fb9b0b4fa37bf6343e130539211b50
images: Move links.txt in tango_testing to place where we expect that.

Change-Id: Ifc6ecce42b43bf3be668020abcfd9ee5ce2e999b
images: Sanitize links.txt.

Some lines were in wrong order, some duplicate images were not removed.

The sanitizing script still reports some duplicates, but they are not
bit-to-bit the same; need a check by a human.

Change-Id: Ic28533ab768dbe0d375f81dfed4bac75bb44d18d
images: Script to sanitize links.txt files.

Checks for the following mistakes:

* swapped original and link
* both exist, and are the same - git rm link then
* both exist, and differ - warn about that, so that a human can check

Change-Id: I6e0fc5c5b47fbb34aef8a1069c76720e9d6f8d5f
images: Fix links to another links.

Change-Id: Icc45c78caaf1c6c757677c5d432cb19ba69f2278
images: Add check for links.txt entries where neither icon exists.

And remove them from tango and tango_testing links.txt.

Change-Id: I47cce64eac403bfaa8dd40f9e1878565bd8ae80f
Doxygenize.

Change-Id: If6f2ea55d4bdd9a706e547fd4a51b42c8ad10a8b