Fixed min/max setting for floating point images
And made sure that KNOB_RELEASED_PROPERTY is always fired on
changes in the text fields
Fixed a bug in NumericalTextField and removed some unused code
Fixed: Textfields for channel sliders often too small
Added a popup warning message, when out-of-range values are entered
refactoring share templates to remove duplicates
fixing comment in share
disable group/user menu for public tab
fixing experimenter icon in a tree
fixing bad url
OMERO5.1DEV__12: modify experimenter and password.

This commit drops the "dn" column from the "password" table
and adds update scripts for adding an "ldap" column to "experimenter"
and setting it to the correct value based on "dn".
setDN() uses a boolean flag instead of string.

This changes the method declaration to accept a boolean instead
of the new DN string. The change happens on the "experimenter"
table ("ldap" column) and not on "password".
SqlAction.java: Remove unused actions, add new.

This removes actions that relied on the "dn" column of the
"password" table and also add surrogate actions that make use
of the new "ldap" column.
PasswordUtil.java: Use updated SQL action.

This simplifies the usage of PasswordUtil and the logic in AdminImpl
and ResetPasswordRequestI.
LdapImpl.java: Update method logic.

This is due to the updates to SQL actions and also the now
available new direct way of checking if a user came from an LDAP
server.
LdapImpl.java: Mimic SQL action return values.

This hard-codes the column names, as they are expected by
AdminI. It is not a portable solution and could be done better.
Deprecate bin/omero ldap discover.

Since the DN can't get out of sync anymore, this method isn't
required.
PasswordTest.java: Fix failing unit test.
Update UI to make use of new "ldap" field.

This also fixes the way how the "LDAP" label was rendered
in the user account properties.
Make "ldap" column required.
Merge pull request #3108 from dominikl/min_max_channelslider_fix

Fixed bug ChannelSlider (rendering settings)