Merge 15.1.4

See merge request !1307

Resolve "Orthogonal reactions drawn wrongly when linking to phenotypes and drugs"

See merge request !1306

changelog updated

See merge request !1304

structural state is available for complexes

See merge request !1305

Resolve "reverse search pop-up display"

Closes #1366

See merge request !1303

Resolve "Group search results by diagram"

Closes #1451

See merge request !1302

fix slider

Closes #1064

See merge request !1301

Resolve "Change active tab when choosing a "Show all" element from pin popup"

Closes #1365

See merge request !1298

Resolve "MINERVANET - Error Report #39 - Failed to fetch"

Closes #738

See merge request !1297

Resolve "SBGN view: unit of information is shown twice for a multimer"

Closes #1358

See merge request !1299

Merge branch '1471-arrows-without-a-process-box-have-an-irregular-empty-space-in-their-lines' into 'master'

Resolve "Arrows without a "process" box have an irregular empty space in their lines"

Closes #1471

See merge request !1296

Merge remote-tracking branch 'origin/master' into 1471-arrows-without-a-process-box-have-an-irregular-empty-space-in-their-lines

Resolve "SBML conversion: individual source/sink objects for all reactions"

Closes #1475

See merge request !1295

Resolve "missing info about species id for sbml import warnings"

Closes #1472

See merge request !1294