Resolve "Custom images as overlay levels or background"

Closes #487 (closed)

Example file that can be used to show z-index support and glyphs for elements is in the attachment.glyph_example.zip

changed milestone to %v13.1.0~beta.0

added enhancement label

added 20 commits

• a96f48c2...4c305a38 - 7 commits from branch master
• 4a1afe90 - BioEntity contain information about z-index
• 40db452e - comparator checks z-index
• e1f924aa - default populator of z-index implemented
• b7f30b21 - celldesigner provides z-index when parsing
• 8c8ad6fc - pathways are included in db change
• 5fbc81ea - Merge remote-tracking branch 'origin/master' into 487-custom-images-as-overlay-levels-or-background
• 54fd328a - sql script moved due to merge
• 9efbf1b3 - defined z-index shouldn't influence algorithm assigning z-index
• 6c7454a0 - import/export of sbml supports z-index
• 2ae42db3 - when parsing sbgn file z-index is automatically assigned
• c8fb7f9e - z-index implemented for gpml
• 9d84a793 - layer elements contain z index
• 0b2d056a - drawing is done according to z-index order

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added 6 commits

• 78efa4fe - z-index can be passed as a parameter in cell designer file
• 195b47be - debug removed
• b706a06b - debug method improved
• 65903e01 - empty id should be changed to null
• beb2f312 - z-index is parsed properly and fields data are removed only when applicable
• 0bc2881e - unit tests fixed

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added 2 commits

• c0afff14 - after simplifiaction this exception is not thrown anymore
• f7c0f018 - export to CellDesigner doesn't support z-index, therefore it must be ignored in comparison

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added 1 commit

• 4ce0bb1f - class allowing properties changed to properly reflect object properties

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added 14 commits

• 1233ccd8 - typeos + formatting
• 883722f2 - glyph data structure created
• 6ca2f662 - glyphs are added to the project in a zip parser
• 65335d19 - glyphs are assigned to elements having glyph property
• f4e3dc56 - typo
• 01a53062 - old code removed
• e4ea5135 - typos
• 21b28450 - drawing of glyphs implemented
• 051815d4 - glyph input is processed properly and proper exception returned when there is a problem with input
• 3f299d06 - frontend send properly parsed data for zip file
• 8373beb0 - when copying element fon't forget about glyph
• 33b5a143 - problem with not drawing images on map upload fixed
• 5cc7ecf1 - unused code removed
• 248ae960 - search by coordinates resolves ties with z-index

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unmarked as a Work In Progress

enabled an automatic merge when the pipeline for 248ae960 succeeds

canceled the automatic merge

added 1 commit

• cd1ab9fd - changelog updated

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enabled an automatic merge when the pipeline for cd1ab9fd succeeds

changed the description

mentioned in commit 3fb09925

merged