fix log panel not scrolling on initial open

[rchl]

There was annoying issue with LSP Log Panel that meant that the content didn't scroll when opened initially.

I've experimented a bit with a simple plugin and noticed this this seems like a bug that triggers when:

• panel view's scroll_past_end setting is set to False
• and panel is shown with more than a screenfull of content inserted at the same time

The work around is to just trigger view.show(view.sel(), animate=False) after inserting text to scroll the view to the end (or wherever selection was set too if it's not the initial opening).

[rchl]

Used this plugin to test, reproduce and workaround the issue:

import sublime_plugin

PANEL_NAME = 'test-panel'
OUTPUT_PANEL_SETTINGS = {
    'scroll_past_end': False,
}


class CreateTestPanelCommand(sublime_plugin.WindowCommand):
    def run(self) -> None:
        panel = self.window.find_output_panel(PANEL_NAME)
        if not panel:
            panel = self.window.create_output_panel(PANEL_NAME)
            settings = panel.settings()
            for key, value in OUTPUT_PANEL_SETTINGS.items():
                settings.set(key, value)
        self.window.run_command('show_panel', {'panel': 'output.{}'.format(PANEL_NAME)})
        panel.set_read_only(False)
        panel.run_command('insert', {'characters': 'abc\n' * 100})
        # panel.show(panel.sel())
        panel.set_read_only(True)


class DestroyTestPanelCommand(sublime_plugin.WindowCommand):
    def run(self) -> None:
        self.window.destroy_output_panel(PANEL_NAME)

[rchl]

Will get it in as I've been battle testing it for a while.