gedit menus don't respond to clicks with macos client, centos 6.x server

[Antoine Martin]

Other combinations work fine:

• Fedora servers
• centos 7.x servers
• windows or Linux clients

Could well be related to: #469, #770, #761

[Antoine Martin]

Found that this is a regression by trying the old 0.14.x LTS as server. Bisection:

• 0.14.x OK
• 0.16.x OK
• 0.17.x OK
• 1.0.x r14500 NOK
• r14400 NOK
• r13000 OK
• r13500 OK
• r14000 NOK
• r13750 NOK
• r13625 OK
• r13690 NOK
• r13660 OK
• r13675 OK
• r13682 OK
• r13686 OK
• r13688 OK
• r13689 OK
• r13690 NOK

So the problem is XPRA_REPARENT_ROOT which was changed to enabled by default in r13690.
More details in #770, now re-opened.

So r15216 disables it again in the v1.0.x branch (v2.0 has not been changed so far because it doesn't support centos6), which means that drag and drop will not work in the next update... we have to choose one or the other.

[Antoine Martin]

r15262 is a better fix: we undo a hackish change so that we can keep reparent-to-root (and therefore drag-n-drop support). r15263 for v1.x branch.
Will follow up in #469.

[migration script]

this ticket has been moved to: ​https://github.com/Xpra-org/xpra/issues/1453