Changed action button border colours so that there is just one pixel light top
left and one pixel dark bottom right border, and changed focus rectangle to
light blue
o.c.opibuilder: generalise check whether file exists

Allows 'workspace-absolute' paths as well as 'filesystem-absolute'
paths.  See cs-studio issue 648.
Merge pull request #662 from ControlSystemStudio/bug658

o.c.logging.jms2rdb: Separate rdb_user/password preferences
o.c.opibuilder: use existing function to check for OPI existence

This is still being debated in #657.
Action button: added code to put text on button underneath icon if there is more space there
Action button: explicitly set label background colour to fix bug where it doesn't update when the alarm severity changes
Fix alarm colours so that background and foreground colours are saved when
they are changed, and that the figureOKStatus is saved in edit mode as well
as run mode so that checking alarm state doesn't lose your saved colours
Change selection colour from light blue to SWT.COLOR_LIST_SELECTION
Merge pull request #654 from dls-controls/action_button_fixes

Action button fixes
Merge pull request #657 from dls-controls/bug648v2

o.c.opibuilder: generalise check whether file exists
fixing classpaths and missing import in o.c.swt.widgets
pull request #654 had unknown variable, correcting to FONT
Merge pull request #665 from berryma4/master

Correcting build errors
migrating to rap 2.0 https://www.eclipse.org/rap/noteworthy/2.0/migration-guide/
Merge pull request #666 from berryma4/master

migrating to rap 2.0
o.c.display.pvtable: correcting required plugins
Merge pull request #667 from berryma4/master

o.c.display.pvtable: correcting required plugins
o.c.alarm.beast.ui.rap: migrate to rap 2.0
Merge pull request #668 from berryma4/master

o.c.alarm.beast.ui.rap: migrate to rap 2.0
Action Button: use getFont() to calculate text position rather than default FONT

Conflicts:

	applications/plugins/org.csstudio.swt.widgets/src/org/csstudio/swt/widgets/figures/ActionButtonFigure.java